KR20160067018A - A light controlling apparatus and method of fabricating the same - Google Patents

Abstract

Provided are a light control apparatus and a manufacturing method thereof. The light control apparatus comprises: first and second electrode units configured to face each other; and a liquid crystal unit between the first and second electrode units. The liquid crystal unit includes: a liquid crystal; a net layer including a first polymer arranged in the inside of the liquid crystal and polymerized from a first monomer having a shape similar to the liquid crystal and a second polymer polymerized from a second monomer having a shape different from the shape of the first monomer; and a side wall arranged in the inside of the liquid crystal and including the first and second polymers. The purpose of the present invention is to provide a light control apparatus with reduced power consumption, as the light control apparatus is able to implement a transparent mode in an initial state.

Description

TECHNICAL FIELD [0001] The present invention relates to a light control device and a method of manufacturing the same,

The present invention relates to a light control device and a method of manufacturing the same.

Recently, as the information age is approaching, a display field for processing and displaying a large amount of information has been rapidly developed, and various flat panel display devices have been developed in response to this.

Specific examples of such a display device include a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display device (FED), an electroluminescent display device An electroluminescence display device (ELD), and an organic light emitting diode (OLED). This display device has excellent performance of being thinner, lighter, and lower in power consumption, and the application field of display devices is continuously increasing. In particular, in most electronic devices and mobile devices, a display device is used as one of the user interfaces.

In recent years, studies have been made actively on a transparent display device which allows a user to view objects or images located on the opposite side through a display device.

The transparent display device has advantages of space utilization, interior and design, and can have various application fields. The transparent display device realizes a display device functioning as information recognition, information processing, and information display in a transparent electronic device, thereby eliminating the spatial and visual restrictions of the electronic device compared to the existing display device. Such a transparent display device can be used in a smart window, and a smart window can be applied to a window used in a smart home or a smart car.

Among them, the LCD can be realized as a transparent display device by applying an edge type backlight, but a transparent display device using an LCD has a very low transmittance and a disadvantage that the transparency is lowered by a polarizing plate used for black implementation And there is a drawback to outdoor visibility.

In addition, a transparent display device incorporating an OLED has a higher power consumption than a transparent display device using an LCD, has difficulty in expressing true black, has no problem in contrast ratio in a dark environment, The contrast ratio is lowered in a general environment where the display device is a display device.

Therefore, in order to realize a transmissive mode and a light-shielding mode, a polymer dispersed liquid crystal (PDLC) or a polymer network liquid crystal (PDLC) composed of a single layer in a light control device of a transparent display device incorporating an OLED polymer networked liquid crystal (PNLC). A polymer dispersed liquid crystal (PDLC) or a polymer networked liquid crystal (PNLC) composed of a single layer is prepared by mixing monomers and liquid crystals and then irradiating ultraviolet rays (UV) .

Particularly, polymer dispersed liquid crystal (PDLC) has a structure in which a liquid crystal is formed in a polymer, and a polymer network liquid crystal (PNLC) has a network in which a polymer is distributed on a liquid crystal.

When an electric field is applied to a polymer dispersed liquid crystal (PDLC) or a polymer network liquid crystal (PNLC), the arrangement of liquid crystals changes, and light incident from the outside can be scattered or transmitted. That is, a device using a polymer dispersed liquid crystal (PDLC) or a polymer network liquid crystal (PNLC) can scatter light or transmit light without a polarizing plate, and thus can be applied to a light control device of a transparent display device.

An object of the present invention is to provide a light control device with reduced power consumption, since light can be transmitted from an outside in an initial state in which no voltage is applied and a transparent mode can be realized in an initial state.

Another object of the present invention is to provide a light control device in which a mesh film and a partition are simultaneously contained in a liquid portion.

It is still another object of the present invention to provide a light control device comprising a partition and a net including two kinds of polymers using two or more different kinds of monomers.

It is still another object of the present invention to provide a light-shielding device having improved transmittance and light-shielding ratio by arranging liquid crystals in disorder by using monomers having a shape similar to liquid crystals to assist vertical alignment of liquid crystals and using monomers having disordered shapes .

It is still another object of the present invention to provide a light control device having a light shielding mode capable of blocking or scattering light coming from the outside to display colors or to prevent the background of the device from being seen.

Still another object of the present invention is to provide a light control device having high visibility by providing a light-shielding mode for providing a transparent mode to a user or blocking external light by being coupled to a transparent display device.

It is still another object of the present invention to provide a light control device applicable to a flexible display device.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a light control apparatus including a first electrode unit and a second electrode unit facing each other, and a liquid crystal unit between the first electrode unit and the second electrode unit, The liquid crystal portion includes a liquid crystal, a mesh layer that is disposed inside the liquid crystal portion and includes a first polymer polymerized from a first monomer having a shape similar to a liquid crystal and a second polymer polymerized from a second monomer having a shape different from that of the first monomer And a partition wall located inside the liquid portion and including the first polymer and the second polymer.

According to another aspect of the present invention, the light control device further includes a spacer disposed on at least one of the first electrode portion and the second electrode portion.

According to another aspect of the present invention, the first monomer and the second monomer are UV curable monomers.

According to another aspect of the present invention, the UV wavelength used for curing the first monomer and the UV wavelength used for curing the second monomer have the same wavelength range.

According to another aspect of the present invention, the first monomer is a RM (Reactive Mesogen) -based monomer.

According to another aspect of the present invention, the second monomer is a bisphenol A dimethacrylate-based monomer.

According to another aspect of the present invention, the first monomer aids vertical orientation of the liquid crystal, and the second monomer aids in the disordered arrangement of the liquid crystal.

According to another aspect of the present invention, when the liquid crystal is one of a negative liquid crystal or a dual frequency liquid crystal (DFLC), each of the first electrode portion and the second electrode portion includes a common electrode.

According to another aspect of the present invention, when the liquid crystal is a negative liquid crystal, each of the first electrode portion and the second electrode portion is configured to apply a vertical electric field to the liquid portion.

According to another aspect of the present invention, a light control device to which a voltage is not applied represents a transparent mode by a liquid crystal having a homeotropic state, a light control device to which a voltage is applied exhibits a random state, And the light-shielding mode is indicated by the liquid crystal.

According to another aspect of the present invention, in the case where the liquid crystal is one of a positive liquid crystal or a DFLC, at least one of the first electrode portion and the second electrode portion includes a plurality of pattern electrodes.

According to still another aspect of the present invention, a horizontal electric field is applied to the pattern electrode.

According to another aspect of the present invention, when no voltage is applied, the light control device displays a transparent mode by a liquid crystal having a homeotropic state, and when a voltage is applied, the light control device displays a disordered phase and a liquid crystal having a random state exhibits a light shielding mode.

According to another aspect of the present invention, when the liquid crystal is one of a positive liquid crystal or a DFLC, at least one of the first electrode portion and the second electrode portion includes a plurality of pattern electrodes and a common electrode.

According to still another aspect of the present invention, a horizontal electric field is applied to the pattern electrode and the common electrode.

According to another aspect of the present invention, when no voltage is applied, the light control device displays a transparent mode by a liquid crystal having a homeotropic state, and when a voltage is applied, the light control device displays a disordered phase and a liquid crystal having a random state exhibits a light shielding mode.

According to another aspect of the present invention, the light control apparatus further includes an alignment section for aligning the liquid crystal in a homeotropic state.

According to another aspect of the present invention, the alignment portion is disposed above or below the liquid crystal portion.

According to an aspect of the present invention, there is provided a method of fabricating a light control device, the method comprising: attaching a first electrode unit and a second electrode unit; attaching a first electrode unit and a second electrode unit between the first electrode unit and the second electrode unit; Forming a liquid crystal portion including a mixed liquid crystal including a monomer, a second monomer, and a liquid crystal; positioning a mask having a pattern on the first electrode portion or the second electrode portion; polymerizing the first monomer and the second monomer; And forming a mesh film by polymerizing the first and second monomers at a lower irradiation energy than the step of forming the barrier ribs.

According to another aspect of the present invention, there is provided a method of manufacturing a light control device, the method further comprising disposing a spacer on at least one of the first electrode portion and the second electrode portion.

According to another aspect of the present invention, the first monomer and the second monomer are polymerized by light of the same wavelength band.

According to still another aspect of the present invention, each of the step of forming the partition wall and the step of forming the mesh film is characterized by polymerizing the first monomer and the second monomer by UV irradiation.

According to another aspect of the present invention, the first monomer is a RM (Reactive Mesogen) -based monomer.

According to another aspect of the present invention, the second monomer is a bisphenol A dimethacrylate-based monomer.

In order to solve the above problems, in a mixed liquid crystal including a liquid crystal, a first monomer and a second monomer according to an embodiment of the present invention, the first monomer has a shape similar to a liquid crystal, 1 monomer, and the first monomer and the second monomer are configured so as to have a net film and a partition in the light control device.

According to another aspect of the present invention, when no voltage is applied, the light control device displays a transparent mode by a liquid crystal having a homeotropic state, and when a voltage is applied, the light control device displays a disordered image and a liquid crystal having a random state exhibits a shading mode.

According to another aspect of the present invention, the first monomer and the second monomer are cured by UV irradiation at the same wavelength band.

According to another aspect of the present invention, the first monomer is a RM (Reactive Mesogen) -based monomer.

According to another aspect of the present invention, the second monomer is a bisphenol A dimethacrylate-based monomer.

According to another aspect of the present invention, the first monomer and the second monomer are polymerized by UV irradiation.

According to another aspect of the present invention, the liquid crystal is characterized by being one of a positive liquid crystal, a negative liquid crystal, or a dual frequency liquid crystal (DFLC).

According to an aspect of the present invention, there is provided a display device including a display panel and at least one light control device attached to the display panel,

According to another aspect of the present invention, the display panel is an organic light emitting display panel.

According to another aspect of the present invention, a light control device is attached to a front surface of a display panel.

According to another aspect of the present invention, the light control device is attached to a rear surface of a display panel.

The details of other embodiments are included in the detailed description and drawings.

The present invention can provide a light control device capable of driving light in a transparent mode by passing light from outside without applying a voltage.

Further, since the light control device of the present invention forms an image through which light entered from the outside passes through the liquid crystal in the initial state, the transparent mode can be realized in the initial state, so that the power consumption can be reduced.

In addition, the present invention provides a light control device capable of realizing a light-shielding mode that can be realized in a light-shielding mode in which a background of a light control device is not visible by arranging a coloring member made of a dye having a color to express a color other than black or black A control device can be provided

In addition, the present invention can provide a light control device including both a net film and a barrier rib by using two or more different kinds of monomers in the liquid portion.

Further, since the mesh film is located in the liquid portion of the present invention, the liquid crystal can have a disordered phase, so that the scattering effect of the light coming from the outside can be enhanced.

In addition, since the barrier ribs are located inside the liquid portion, the coloring member is prevented from being scattered to a specific region, so that the coloring member can be uniformly distributed in the light control device to prevent light leakage, Can

Further, the present invention can be applied to a flexible display device because the partition wall is located inside the liquid portion, so that the impact applied from the outside can be absorbed.

In addition, the present invention can improve the transmittance in the transparent mode by reducing the refractive index difference by disposing the refractive index matching layer, which can correct the refractive index difference between the respective components, inside the light control device.

Further, the present invention can prevent a short (short) occurring in the inside of the light control device through the partition or the refractive index matching layer, thereby enhancing the driving reliability.

Further, the present invention can improve the transmittance of the light control device because the liquid crystals can have a homeotropic state perpendicular to the electrode portion.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a cross-sectional view of a light control device according to an embodiment of the present invention in a transparent mode;
FIG. 2 is a sectional view of the light control device shown in FIG. 1 according to the light shielding mode. FIG.
3 is a cross-sectional view of a light control device according to another embodiment of the present invention.
4 is a cross-sectional view of a light control device according to another embodiment of the present invention;
5 is a cross-sectional view of a light control device according to another embodiment of the present invention.
6 is a cross-sectional view of a light control device according to another embodiment of the electrode portion of FIG.
Fig. 7 is a cross-sectional view of the light control device according to another embodiment of the electrode portion of Fig. 5
8 is a cross-sectional view of a light control device according to another embodiment of the present invention.
9 is a cross-sectional view of a light control device according to another embodiment of the present invention.
Light control device
10A to 10F are schematic flowcharts of a manufacturing process of a light control device according to embodiments of the present invention.
11A is a schematic plan view illustrating a display device to which a light control device according to an embodiment of the present invention is applied.
11B is a cross-sectional view of the display device according to XI-XI 'of FIG.
11C and 11D are cross-sectional views of a display device according to various embodiments of the present invention.
12A is a schematic plan view illustrating a display device to which a light control device according to an embodiment of the present invention is applied.
12B is a cross-sectional view of the display device according to XII-XII 'of Fig. 12A;
12C is a cross-sectional view of a display device according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

The terms "X-axis direction "," Y-axis direction ", and "Z-axis direction" should not be construed solely by the geometric relationship in which the relationship between them is vertical, It may mean having directionality.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Polymer dispersed liquid crystal (PDLC) and polymer network liquid crystal (PNLC) for use as a light control device of a transparent display differ in the mixing ratio of the monomer and the liquid crystal. Generally, the polymer dispersed liquid crystal (PDLC) has a higher monomer ratio than the polymer network liquid crystal (PNLC). Therefore, the polymer dispersed liquid crystal (PDLC) has an initial shading mode in which light incident by randomly arranged liquid crystals and polymerized monomers in an initial state in which no voltage is applied is scattered When the liquid crystal is arranged vertically by applying a voltage, incident light is transmitted without being scattered, and a transparent mode is realized. When a polymer dispersed liquid crystal (PDLC) is used as a light control device of a transparent display device, it has been difficult to continuously apply a voltage for implementing a transparent mode in a standby mode.

Therefore, the inventors of the present invention have conducted experiments on a polymer network liquid crystal (PNLC) which is advantageous in a transparent mode in an initial state where a voltage is not applied due to a relatively low ratio of monomers. However, the polymer network liquid crystal (PNLC) is less resistant to external impacts because the ratio of the polymerized monomer is smaller than that of polymer dispersed liquid crystal (PDLC). Therefore, a partition wall for enduring an external shock is required. However, it is difficult to form a net if the barrier is formed, and it is difficult to form a barrier when the net is formed.

The inventors of the present invention have recognized the above-mentioned problems and invented a new structure of a light control device capable of realizing a transparent mode and a light shielding mode by forming barrier ribs and mesh films. .

This will be described in the following examples.

FIG. 1 is a cross-sectional view of a light control device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the light control device of FIG. 1 according to a light shielding mode. 1, a light control apparatus 100 according to an exemplary embodiment of the present invention includes an electrode unit 110, a liquid crystal unit 120, an alignment unit 130, a barrier 140, a mesh 150, And a spacer.

The electrode unit 110 includes a first electrode unit 111 and a second electrode unit 112 positioned to face each other and the liquid unit 120 includes a first electrode unit 111 and a second electrode unit 112 . The first electrode unit 111 includes a substrate 111a made of a transparent material and an electrode 111b disposed on the substrate 111a. The first electrode unit 111 and the second electrode unit 112 may have the same configuration and the second electrode unit 112 may be formed of the same substrate 112a and the electrode 112b as the first electrode unit 111, .

The substrate 111a of the first electrode part 111 and the substrate 112a of the second electrode part 112 may be used for a general display device or a substrate used for manufacturing a flexible display device. More specifically, the materials used as the substrates 111a and 112a may be transparent glass-based or transparent plastic-based materials. For example, cellulose resin such as TAC (triacetyl cellulose) or DAC (diacetyl cellulose), cycloolefin polymer such as norbornene derivatives, COC (cyclic olefin copolymer), PMMA (polyvinyl alcohol), polyether sulfone (PES), and polyetheretherketone (PEEK) such as acrylic resin, polycarbonate, PE (polyethylene) or PP (polypropylene) A sheet or a film including a polyester such as PEI (polyetherimide), PEN (polyethylenenaphthalate), and PET (polyethyleneterephthalate), PI (polyimide), PSF (polysulfone), or fluoride resin, 111a, 112a, but the present invention is not limited thereto.

The electrodes 111b and 112b are disposed on one surface of the substrates 111a and 112a and have an electrode shape without a pattern. The electrodes 111b and 112b may be made of a transparent conductive material having conductivity and capable of transmitting external light. For example, the electrode (111b, 112b) will be an oxide (for example; AgO or Ag ₂ O or Ag ₂ O _3), aluminum oxide (for example; Al ₂ O _3), tungsten oxide (for example; WO ₂ or WO ₃ or W ₂ O ₃ ), magnesium oxide (eg MgO), molybdenum oxide (eg MoO ₃ ), zinc oxide (eg ZnO), tin oxide (eg SnO ₂ ), indium oxide (eg In ₂ O ₃ ) Chromium oxides such as CrO ₃ or Cr ₂ O ₃ , antimony oxides such as Sb ₂ O ₃ or Sb ₂ O ₅ , titanium oxides such as TiO ₂ , nickel oxides such as NiO, Such as CuO or Cu ₂ O, vanadium oxides such as V ₂ O ₃ or V ₂ O ₅ , cobalt oxides such as CoO, iron oxides such as Fe ₂ O ₃ or Fe ₃ O ₄ , oxide (for example; Nb ₂ O _5), indium tin oxide (for example; indium tin oxide, ITO), zinc oxide (for example; indium zinc oxide, IZO), aluminum-doped zinc oxide (for example; Aluminium doped zinc oxide, ZAO) , Aluminum-doped tin oxide (e.g., Aluminum Tin Oxide, TAO) and antimony tin oxide Water; it is made of a material selected from the group consisting of (such as Antimony Tin Oxide, ATO), but is not limited to this.

Referring to FIG. 1, the alignment unit 130 is a member for aligning the liquid crystal 120a of the liquid crystal unit 120 in a homeotropic state in an initial state. In this specification, the homeotropic phase means that the liquid crystal 120a is arranged in a direction perpendicular to the electrode unit 110. [ That is, the homeotropic phase means that the long axis 120L of the liquid crystal 120a is perpendicular to the electrode unit 110 and the short axis 120S is arranged horizontally with respect to the electrode unit 110. [

The alignment unit 130 may be located above and below the liquid level. The alignment unit 130 is disposed between the first alignment member 131 and the second electrode unit 112 positioned between the first electrode unit 111 and the liquid crystal unit 120 and the liquid crystal unit 120 And a second alignment member 132, The first alignment member 131 and the second alignment member 132 constituting the alignment unit 130 are made of a vertical alignment material. More specifically, the alignment unit 130 may be formed of any one of a polyimide series and a phosphatidylcholine (PPC) series, but is not limited thereto. In addition, the orientation unit 130 may be formed by mixing hexadecyltrimethylammonium bromide (HTAB) or cetyl trimethyl ammonium bromide (CTAB) in a solvent such as isopropyl alcohol (IPA) Or may be formed by evaporating the solvent after coating the second electrode portion 112.

Although the alignment unit 130 is illustrated as being located on both the upper and lower sides of the liquid crystal unit 120 in FIG. 1, the alignment unit 130 may be located only on one of the upper and lower sides of the liquid crystal unit 120.

The liquid portion 120 is located between the first electrode portion 111 and the second electrode portion 112. 1, the liquid crystal unit 120 is disposed between the first alignment member 131 and the second alignment member 132. As shown in FIG.

The liquid crystal portion 120 includes a liquid crystal 120a, a partition wall 140, and a mesh film 150. The liquid crystal 120a may be either a negative liquid crystal or a dual frequency liquid crystal (DFLC). A method of driving the light control device 100 according to the type of the liquid crystal 120a will be described later.

In some embodiments, monomers may be left in the liquid phase portion 120 for forming the first polymer 141 and the second polymer 142. In some embodiments, A detailed description thereof will be described later with the barrier 140.

As shown in FIG. 1, a partition wall 140 is disposed inside the light control device 100. Specifically, the barrier ribs 140 are disposed between the first electrode unit 111 and the second electrode unit 112. The position of the partition wall 140 in the light control device 100 can be freely changed.

The barrier 140 includes a first polymer 141 and a second polymer 142. The first polymer 141 and the second polymer 142 are formed of different monomers made of a transparent material capable of transmitting light.

In this case, for example, the monomer for forming the first polymer 141 is a photo-curable monomer based on RM (Reactive Mesogen), and the monomer for forming the second polymer 142 is a photo-curable monomer based on bisphenol A dimethacrylate . For example, the first polymer 141 and the second polymer 142 may be formed in such a way that they are polymerized by UV curing of different monomers and form a first polymer 141 and a second polymer 142 The monomer may be a monomer which is cured at a wavelength of 350 to 380 nm. However, the wavelength band of the light for curing the monomers for forming the first polymer 141 and the second polymer 142 may be determined differently depending on the materials constituting the substrates 111a and 112a. In the following, it is assumed that the first polymer 141 is a polymerized polymer from a first monomer and the second polymer 142 is a polymerized polymer from a second monomer.

The first polymer 141 is a polymer having a shape similar to that of the liquid crystal 120a, and may be formed from a first monomer having a shape similar to the liquid crystal 120a. Since the first polymer polymerized with the first monomer 141 has a shape similar to that of the liquid crystal 120a, when the alignment member 130 aligns the liquid crystal 120a in a homeotropic state Can help to arrange. That is, the first polymer 141 in which the first monomer and the first monomer are polymerized has the same shape as the liquid crystal 120a, and can improve the vertical alignment of the liquid crystal 120a upon UV curing.

The second polymer 142 may be formed from a second monomer having a shape different from that of the liquid crystal 120a as a polymer having a shape different from that of the liquid crystal 120a. In some embodiments, the second polymer 142 is a polymer having a disordered shape, and may be formed from a second monomer having various shapes. As the second polymer 142 has a disordered shape, it can help the liquid crystals 120a to be arranged in disorder rather than being arranged in one direction in the light control device 100 shading mode. That is, since the second polymer 142 in which the second monomer is polymerized has various shapes, the liquid crystal 120a can be laid in various directions during the light shielding mode of the light control device 100, ) Can be increased.

The partition wall 140 including the first polymer 141 and the second polymer 142 formed by different monomers can protect the inside of the liquid portion 120 from the force externally applied. Accordingly, the light control device 100 including the barrier 140 as described above is applicable to a transparent display device that is flexible. The barrier ribs 140 can maintain the cell gap h of the liquid crystal molecules 120 and are applied to the first electrode unit 111 and the second electrode unit 112 (Short) can be prevented from being generated. The barrier ribs 140 may block the inside of the liquid crystal display panel 120 by dividing the space inside the PDP 100 and block the liquid crystal 120a in each space defined by the barrier ribs. The liquid portion 120 may be formed.

Since the wavelength band of the light used for curing the first monomer for forming the first polymer 141 and the wavelength band of the light used for curing the second monomer for forming the second polymer 142 are the same, The ratio of the first polymer 141 to the second polymer 142 may be substantially the same. That is, since the first monomer for forming the first polymer 141 and the second monomer for forming the second polymer 142 react with light of the same wavelength band, the first polymer 141 cured in the same process The amount and the amount of the second polymer 142 may be substantially the same so that the ratio of the first polymer 141 and the second polymer 142 in the partition 140 may be substantially the same.

In some embodiments, monomers for forming the first polymer 141 and the second polymer 142 may remain in the barrier 140 and the liquid crystal portion 120. [ When the monomers remain in the final product, the monomers may be polymerized over time and the characteristics of the optical control device 100 may vary, so that the monomers may be all cured with the polymer. However, the first polymer 141 and the second polymer 142 may be left in the barrier 140 and the liquid crystal 120 due to various factors in the manufacturing process.

As shown in FIG. 1, a mesh film 150 is disposed inside the light control device 100. Specifically, the mesh film 150 is disposed between the first electrode unit 111 and the second electrode unit 112. The position of the mesh film 150 in the light control device 100 can be freely changed. The mesh film 150 is distributed in a net shape in the liquid portion 120. Accordingly, when a voltage is applied to the liquid crystal unit 120 and the image of the liquid crystal 120a of the liquid crystal unit 120 changes, the liquid crystal 120a around the mesh film 150 becomes a planar state, And has a tilt angle of. Here, the planar state means that the short axis 120S of the liquid crystal 120a is perpendicular to the electrode unit 110 and the long axis 120L is horizontally aligned with respect to the electrode unit 110. [ The change in the phase of the liquid crystal 120a as voltage is applied to the liquid crystal 120 will be described later with reference to FIG.

The mesh 150 includes two polymers similar to the partition 140 described above, and each of the two polymers may be made of the same material as the first polymer 141 and the second polymer 142. That is, the two polymers constituting the mesh film 150 are formed of different monomers made of a transparent material capable of transmitting light. For example, the monomer for forming the first polymer 141 is a photo-curable monomer of RM (Reactive Mesogen), and the monomer for forming the second polymer 142 is a photo-curable monomer of bisphenol A dimethacrylate series . Here, the RM (Reactive Mesogen) series may be a material having a rod-like liquid crystal phase. In the RM (Reactive Mesogen) series, terminal groups thereof can be polymerized by ultraviolet rays (UV) or heat. The terminal group capable of being polymerized by UV may be any one of acrylate, ethylene, acetylene, and styrene, but is not limited thereto. The terminal group capable of being polymerized by heat may be any one of oxetane and epoxy, but is not limited thereto.

The first polymer 141 of the two polymers included in the mesh film 150 is formed of the same polymer as the first polymer 141 and the second polymer 142, And the second polymer 142 may help arrange the liquid crystals 120a in a random orientation rather than in a particular direction when driving the light control device 100 have. Since the wavelengths of light for curing the monomer for forming the first polymer 141 and the monomer for forming the second polymer 142 are the same, the first polymer 141 in the mesh film 150 and the second polymer 141 The proportion of polymer 142 may be substantially the same.

In some embodiments, monomers may be left for forming the first polymer 141 and the second polymer 142 in the netting film 150, like the barrier 140.

Although not shown in FIG. 1, a spacer may be disposed between the first electrode portion 111 and the second electrode portion 112. Specifically, the spacer may be disposed on both the first electrode unit 110, the second electrode unit 120, or both the first electrode unit 110 and the second electrode unit 120. The spacer may have a ball shape or an elongated shape, but the shape of the spacer is not limited thereto. The spacer can be dispersed in the liquid portion to determine the cell gap h of the liquid portion 120 and to support the cell gap. The spacer may be made of silica (SiO ₂ ).

More specifically, in the fabrication process of the light control device 100, the liquid crystal 120a for forming the liquid crystal unit 120 after the first electrode unit 111 and the second electrode unit 112 are bonded together The first electrode part 111 and the second electrode part 112 are formed between the first electrode part 111 and the second electrode part 112 in order to maintain the cell gap of the excitation part 120. [ The first electrode part 111 and the second electrode part 112 are attached to each other. At this time, the cell gap h of the light control device 100 is determined by the size (height) and the number of the spacers, and the height of the partition wall 140 described above is also determined.

Hereinafter, the transparent mode and the light shielding mode of the light control device 100 will be described with reference to FIGS. 1 and 2. FIG.

1, since the state of the liquid crystal 120a of the liquid crystal 120 in the initial state (normally) of the light control device 100 is a homeotropic phase, the light control device 100 are implemented in a transparent mode that allows light coming from the outside to pass through. The initial state is a state in which no voltage is applied to the liquid crystal unit 120 constituting the light control device 100 and the first electrode unit 111 and the second electrode unit 112 constituting the electrode unit 110 ) Is not applied.

More specifically, the liquid crystal 120a of the liquid crystal unit 120 by the first polymer 141 included in the alignment unit 130 and the barrier 140 and the mesh film 150 during the manufacturing process of the light control device 100 It is already arranged in homeotropic order. Therefore, in the initial state, the light coming from the outside passes through the liquid crystal part 120, and the light control device 100 becomes a transparent mode.

In other words, since the liquid crystal 120a of the liquid crystal unit 120 is cured in a homeotropic state by the first polymer 141 and the orientation unit 130 included in the barrier ribs 140 and the mesh film 150, The liquid crystal 120a of the liquid crystal panel 120 can maintain the homeotropic phase in the initial state. Accordingly, since the light control device 100 has an image passing light from the outside in the initial state, the light control device 100 can realize the transparent mode in the initial state, and thus the power consumption of the light control device 100 can be reduced.

2, when a voltage is applied to the first and second electrode units 111 and 112 of the light control device 100 to apply voltage to the liquid crystal unit 120, The liquid crystal 120a changes from a homeotropic state to a random state including a planar phase. When a voltage is applied to the liquid crystal unit 120 to change the phase of the liquid crystal 120a, a majority of the liquid crystal 120a is changed into a planar image, but the liquid crystal 120a adjacent to the mesh film 150, Refers to a phase having a random tilt angle by the polymers included in the mesh film 150. The arbitrary tilt angle means that the angle is determined in a random manner without being determined in advance.

Specifically, when the liquid crystal 120a is a negative liquid crystal, since the short axis 120S of the liquid crystal 120a moves with respect to the electric field direction, a voltage is supplied to the first electrode unit 111 and the second electrode unit 112 By forming a vertical electric field, the liquid crystal 120a can be changed from a homeotropic phase to a disordered phase including a planar phase. Here, the difference between the voltages applied to the first electrode unit 111 and the second electrode unit 112 is 5 V or more, but the present invention is not limited thereto.

When the liquid crystal 120a is a DFLC in which a phase is switched using a frequency, a voltage having a constant frequency may be applied to the first electrode unit 111 and the second electrode unit 112. For example, To change the liquid crystal 120a from a homeotropic phase to a disordered phase including a planar phase. However, the frequency does not limit the contents of the present invention.

When a voltage is applied to the first electrode unit 111 and the second electrode unit 112 to change the phase of the liquid crystal 120a of the liquid crystal unit 120 as described above, The liquid crystal 120a adjacent to the mesh film 150 is arranged with a random tilt angle instead of on the planer. The liquid crystal 120a adjacent to the mesh film 150 by the second polymer included in the mesh film 150 in the light shielding mode includes the random tilt Has a tilt angle and becomes disordered. Therefore, in the light-shielding mode, light is scattered even by the liquid crystal 120a having the planar image in the liquid crystal unit 120, but light is also scattered by the liquid crystal 120a randomly arranged with a random tilt angle. Is scattered. Therefore, the liquid crystal 120a of the liquid crystal unit 120 has disordered images including planar images on homeotropic light, thereby scattering light. Since the barrier rib 140 also includes the second polymer 142, the liquid crystal 120a adjacent to the barrier rib 140 may be randomly arranged with a random tilt angle. Since the barrier ribs 140 have a relatively large surface area relative to the mesh film 150, the liquid crystal 120a adjacent to the barrier ribs 140 may be relatively less tilted than the liquid crystal 120a adjacent to the mesh film 150 .

Therefore, when light enters the liquid crystal unit 120 from the outside in the light shielding mode, light scattering occurs inside the liquid crystal unit 120 because the liquid crystal 120a of the liquid crystal unit 120 maintains a disordered image.

In this way, when the liquid crystal unit 120 is driven in the light-shielding mode, the opaque state of milk, for example, opaque white or gray color is displayed. As a result, You can make the background invisible.

A method in which the light control device 100 switches back to the transparent mode as shown in Fig. 1 again in the light shielding mode is as follows. When the liquid crystal 120a of the liquid crystal unit 120 is a negative liquid crystal and the voltage supplied to the first electrode unit 111 and the second electrode unit 112 of the light control device 100 is cut off, 120 is phase-transformed into a disordered phase homeotropic phase, the light control device 100 is switched to the transparent mode.

When the liquid crystal 120 is DFLC, when the voltage supplied to the first electrode unit 111 and the second electrode unit 112 of the light control device 100 is cut off or a voltage having a predetermined frequency is supplied, Since the liquid crystal 120a of the liquid crystal panel 120 is phase-shifted to the disordered phase homeotropic phase, the light control device 100 is switched to the transparent mode.

Therefore, the light control device 100 according to the embodiment of the present invention can maintain a transparent mode in an initial state in which no voltage is applied to the first electrode unit 111 and the second electrode unit 112, When a voltage is applied to the first electrode unit 111 and the second electrode unit 112, the light shielding mode can be maintained. Accordingly, the light control apparatus 100 can maintain the light-shielding mode as required while maintaining the transparent mode at normal times, so that the power consumption of the light control apparatus 100 is reduced, Or as a smart window.

3 is a cross-sectional view of a light control device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the optical control device 200 according to the present embodiment will be described with reference to these.

3, the light control device 200 includes an electrode unit 210, a liquid crystal unit 220, an alignment unit 230, a barrier 240, a mesh 250, a spacer and a coloring member 270, . More specifically, the electrode portion 210, the liquid portion 220, the alignment portion 230, the partition 240, the mesh film 250, and the spacers, which constitute the light control device 200 of the present embodiment, The liquid portion 120, the alignment portion 130, the partition wall 140, the mesh film 150, and the spacers of the light control device 100 described with reference to FIGS. Therefore, the description of the overlapping elements already described with reference to FIGS. 1 and 2 will be omitted.

Referring to FIG. 3, the light control device 200 according to the present embodiment further includes a coloring member 270 located inside the liquid crystal part 220.

More specifically, the coloring member 270 may have any one of the colors of black, red, green, blue, and yellow, And may be made of a dye.

When the coloring member 270 is made of a black dye and the light control device 200 operates in the light shielding mode, the liquid crystal 220a and the mesh film 250 of the liquid crystal unit 220, The light scattered by the coloring member 270 is finally absorbed by the coloring member 270. Thus, the light control apparatus 200 can operate in a light shielding mode indicating black to maintain the black state.

In addition, when the light control device 200 is coupled to the transparent display panel, the light control device 200 must operate in a light shielding mode in which the light control device 200 can display black in order to provide a high image visibility to the user when the panel is driven. The coloring member 270 may have a black color.

If the coloring member 270 has a color of red, green, blue, or yellow, or a mixture thereof, as described above, , And the light control device 200 can display the color of the coloring member 270 in the shading mode. Accordingly, when the light control device 200 according to the present embodiment is implemented in a light-shielded mode, various colors other than the black-based color can be displayed and the backlight can be shielded. Accordingly, the light control device 200 according to the exemplary embodiment of the present invention can provide a variety of colors in the light-shielding mode, thereby providing aesthetic effect to the user. For example, when the light control apparatus 200 is used in a public place, the light control apparatus 200 can be applied to a smart window or a public window requiring a transparent mode and a light shielding mode, Shading can be done while expressing various colors.

The coloring member 270 is affected by the direction of the liquid crystal 220a and its arrangement is changed. The coloring member 270 in the initial state is perpendicular to the first electrode unit 211 or the second electrode unit 212 along the liquid crystal 220a of the liquid crystal unit 220, 270L) is shorter and the shorter axis (270S) is shorter, it is possible to maintain a high transmittance in a transparent mode implementation and to maintain a high shading rate when a light shielding mode is implemented.

More specifically, referring to FIG. 3, since the liquid crystal 220a is perpendicular to the first electrode unit 211 or the second electrode unit 212 in the initial state in which no voltage is applied, And is a homeotropic phase perpendicular to the electrode portion 211 or the second electrode portion 212. The light reaches the short axis 270S which is shorter in length than the long axis 270L of the coloring member 270 in the initial state in which no voltage is applied to the liquid crystal unit 220, The amount of light to be absorbed is very small and the majority of the light passes through the liquid crystal part 220, so that the light control device 200 can be realized in a transparent mode in which the light is maintained in a transparent state.

That is, in a state where no voltage is applied to the liquid crystal 220, the liquid crystal 220a of the liquid crystal unit 220 passes through the light, and the region where the light reaches the coloring member 270 is very small. ) Can maintain the transparent mode.

When the light control device 200 is implemented in a light-shielding mode, the coloring member 270 lies along the direction in which the liquid crystal 220a in the periphery affected by the electric field lie (i.e., the arrangement direction of the liquid crystal 220a). The reason why the arrangement direction of the coloring member 270 is changed is that the liquid crystal 220a is in a liquid state and the coloring member 270 is a solid or a state close to a solid state so that a direction in which liquid flows (i.e., a direction in which an image of the liquid crystal 220a is changed) The arrangement of the coloring members 270 which are solid is changed. That is, since the liquid crystal 220a in a state in which the voltage as shown in FIG. 2 is applied has a disordered arrangement with a random tilt angle including a planar image, The liquid crystal 220a in the liquid crystal panel 220a may become planar or disordered. For example, the coloring member 270 in the vicinity of the liquid crystal 220a lying in the X direction lies in the X direction along the liquid crystal 220a, and the long axis 270L of the coloring member 270 is in the X- Electrode portions 211 and 212, respectively. The coloring member 270 in the vicinity of the surface where the liquid crystal 220a lies in the Y direction is laid in the Y direction along the liquid crystal 220a and the long axis 270L of the coloring member 270 is in contact with the first and second electrode portions 270a, (211, 212). The coloring member 270 near the net 250 may have a disordered arrangement with a random tilt angle similar to the liquid crystal 220a near the net 250. That is, when an electric field is formed in the liquid crystal part 220 and the image of the liquid crystal 220a of the liquid crystal part 220 changes, the coloring member 270 in the vicinity of the mesh film 250 becomes a planar image, It changes randomly with a tilt angle. The light scattered by the liquid crystal 220a and the netting film 250 comes into contact with the long axis 270L of the coloring member 270 which is relatively longer than the minor axis 270S of the coloring member 270, Most of the light is absorbed by the coloring member 270 because there are a large number of areas contacting the member 270. Accordingly, the light control device 200 can be realized as a light shielding mode in which the color of the coloring member 270 is expressed while maintaining the light shielding state.

Since the partition 240 is formed in the liquid crystal part 220, the coloring member 270 blended together with the liquid crystal 220a in the liquid crystal part 220 can be prevented from being concentrated in a specific area. More specifically, the inside of the liquid level portion 220 is divided into a plurality of compartments (or regions) by the partition 240, and the coloring member 270 located in each compartment can not move to another compartment. The coloring member 270 may move inside the liquid crystal unit 220 depending on the external pressure or the state of implementation of the light control device 200 if there is no partition 240 in the liquid crystal unit 220. [ Accordingly, when the light control device 200 is implemented in a light shielding mode in a state where the coloring member 270 is not uniformly distributed throughout the liquid crystal unit 220, light may leak in some areas. However, in the structure in which the barrier 240 is disposed in the liquid portion 220 and the coloring member 270 is located in the partition defined by the barrier 240, as in the light control device 200 of the present embodiment, Since the movement of the light control device 200 is very limited, the light control device 200 can be implemented in a shading mode as a whole, thereby increasing the shading rate in the shading mode of the light control device 200.

The weight ratio of the coloring member 270 may be determined depending on the type of display device to which the light control device 200 is applied. For example, when the light control device 200 is a transparent display device disposed in a room, it is important that the light control device 200 has a high transmittance in a transparent mode. Therefore, the weight ratio of the coloring member 270 is relatively small . In the case of the transparent display device in which the light control device 200 is disposed outdoors, it is important that the light control device 200 has a high light shielding ratio in the light shielding mode, so that the weight ratio of the coloring member 270 is relatively large desirable. In some embodiments, the weight ratio of the coloring member 270 may be 1 wt%, but is not limited thereto.

4 is a cross-sectional view of a light control device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the light control device according to the present embodiment will be described with reference to these.

4, the light control device 300 includes an electrode unit 310, a liquid crystal unit 320, an alignment unit 330, a barrier rib 340, a mesh film 350, a spacer, a coloring member 370, And a refractive index matching layer 380. More specifically, the electrode portion 310, the liquid portion 320, the alignment portion 330, the partition wall 340, the mesh film 350, and the spacers, which constitute the light control device 300 of this embodiment, The liquid portion 120, the alignment portion 130, the partition wall 140, the mesh film 150, and the spacers of the light control device 100 described with reference to FIGS. The coloring member 370 constituting the light control device 300 is the same as the coloring member 270 described with reference to Fig. Therefore, the description of the overlapping elements already described with reference to FIGS. 1 to 3 will be omitted.

Referring to FIG. 4, the light control device 300 further includes a refractive index matching layer 380. As shown in FIG. 4, the refractive index matching layer 380 is located inside the electrode portion 310. More specifically, the refractive index matching layer 380 is disposed between the substrate 311a and the electrode 311b inside the first electrode portion 311 and between the substrate 312a and the electrode 312b inside the second electrode portion 312 .

In addition, the refractive index matching layer 380 may be positioned between the electrode 310 and the alignment part 330. For example, the refractive index matching layer 380 may be positioned between the electrode 311b constituting the first electrode portion 311 and the first aligning member 331 constituting the aligning portion 330, The refractive index matching layer 380 may be positioned between the electrode 312b constituting the portion 312 and the second orientation member 332 constituting the orientation portion 330. [

The refractive index matching layer 380 may be positioned between the alignment portion 330 and the liquid level portion 320. More specifically, the refractive index matching layer 380 may be positioned between the liquid level portion 320 and the first alignment member 331 and / The refractive index matching layer 380 may be positioned between the first alignment member 320 and the second alignment member 332.

That is, the refractive index matching layer 380 is positioned between the components having different refractive index among the constituent elements of the light control device 300, so that the light entering from the outside can be incident on the inside of the light control device 300 It can pass.

The refractive index matching layer 380 may be made of any one of a polymer, an optical clear adhesive (OCA) which is one of optical transparent adhesives, an organic compound adhesive such as a thermally or UV curable organic polymer compounding material, and has a refractive index of 1.3 to 1.9 I have. The first electrode unit 311 and the second electrode unit 312 constituting the light control device 300 of the present invention may have a refractive index within a range of 1.6 to 1.8 and the liquid crystal 320a of the liquid crystal unit 320 may be 1.3 To 1.6. ≪ / RTI > For example, the substrates 311a and 312a may have a refractive index of about 1.6 and the electrodes 311b and 312b may have a refractive index of about 1.8. The alignment unit 330 may be constructed in the same manner in accordance with the refractive index of the liquid crystal 320a of the liquid crystal unit 320 in general.

The refractive index matching layer 380 may be used to correct the refractive index difference because the refractive index difference may occur for each constituent element of the light control device 300. [ That is, the refractive index matching layer 380 cancels the refractive index difference in the first electrode unit 311 and the refractive index difference in the second electrode unit 312, As shown in FIG.

Therefore, it is possible to provide a more improved transmittance to the user while maintaining the transparent state by the light control device 300 in the transparent mode. Further, while the light control device 300 is in the light shielding mode and maintains the light shielding state, it is possible to provide the user with a further improved light shielding ratio.

Hereinafter, a case where the light control device 300 operates in a transparent mode will be described as an example.

When light that has passed through the substrate 311a of the first electrode unit 311 is incident on the electrode 311b while no voltage is applied to the liquid crystal 320a of the liquid crystal unit 320, The light can be scattered toward the substrate 311a due to the difference in refractive index between the first substrate 311a and the second substrate 311b. Also, when light passes through the first alignment member 331 and enters the liquid crystal unit 320, the light may be scattered toward the first electrode unit 311 due to the difference in refractive index. When the light passing through the liquid crystal part 320 and the alignment part 330 passes through the second electrode part 312, the light again reaches the liquid crystal part due to the difference in refractive index between the electrode 312b and the substrate 312a 320). ≪ / RTI > When the light control device 300 is in the transparent mode, scattering of light occurs due to the refractive index difference of the respective components, so that some light can not pass through the light control device 300, Can fall.

However, if the refractive index matching layer 380 is disposed in the light control device 300 considering the refractive index difference of each component, the light is transmitted to the light control device 300 while the light control device 300 operates in the transparent mode. No scattering occurs when passing. The difference in refractive index between the electrodes 310 and 312b and the refractive index difference between the electrodes 311b and 312b by the refractive index matching layer 380 and the refractive index difference between the electrode 310 and the alignment part 330, 330 may be reduced. Therefore, while the optical control device 300 is operating in the transparent mode, the light incident from the outside can pass through the inside of the optical control device 300 without loss as much as possible, and thus a high transmittance can be provided to the user.

Also, when the light control device 300 is set to the light-shielding mode, the light scattering rate and the shielding rate may be lowered due to the unnecessary scattering rather than the scattering required for shielding due to the difference in refractive index between the respective components have. On the other hand, when the refractive index matching layer 380 is disposed in the light control device 300 considering the refractive index difference of the respective components, the scattered light can be transmitted to the light control device 300 while the light control device 300 operates in the light- Since most of the light travels toward the liquid crystal part 320, the light is transmitted to the coloring member 370, thereby providing a high shading ratio to the user.

As described above, the refractive index matching layer 380 may be formed of any one of polymer, optical clear adhesive (OCA), which is one of transparent adhesives for optical use, and organic compound adhesive, such as heat or UV curable organic polymer compound Therefore, it is possible to prevent a short circuit (short circuit) that may occur within the light control device 300. More specifically, there is a possibility that minute foreign matter may be mixed with the liquid crystal 320a of the liquid crystal part 320 during the manufacturing process of the light control device 300. [ The foreign substance acts as a conductor that enables electrical connection between the electrode 311a of the first electrode unit 311 and the electrode 312a of the second electrode unit 312. In the light control apparatus 300, The electrode 311a and the electrode 312a may be disconnected.

However, since the refractive index matching layer 380 according to the embodiment of the present invention is made of the above-mentioned material, it can serve as an insulator. Therefore, the refractive index matching layer 380 can prevent the occurrence of disconnection in the light control device 300, thereby enhancing the driving reliability of the light control device 300.

Therefore, the refractive index matching layer 380 can improve the transmittance and shading ratio of the light control device 300 and increase the driving reliability of the light control device 300.

The refractive index matching layer 380 may not be employed in the light control device 300.

FIG. 5 is a cross-sectional view of a light control device according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view of a light control device according to another embodiment of the electrode portion of FIG. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the light control device according to the present embodiment will be described with reference to these.

5 and 6, a light control device 400 according to an embodiment of the present invention includes an electrode unit 410, a liquid crystal unit 420, an alignment unit 430, a barrier 440, 450 and spacers. More specifically, the orientation unit 430, the partition 440, the mesh film 450, and the spacers constituting the optical control device 400 of the present embodiment are the same as the optical control apparatus 100 described with reference to Figs. 1 and 2 The partition 130, the mesh 150, and the spacer. Therefore, the description of the overlapping elements already described with reference to FIGS. 1 and 2 will be omitted.

The liquid crystal section 420 includes a liquid crystal 420a. The liquid crystal 420a constituting the liquid crystal part 420 may be formed of either positive liquid crystal or DFLC. A method of driving the light control device 400 according to the type of the liquid crystal 420a will be described later.

5, the electrode unit 410 constituting the light control device 400 includes a first electrode unit 411 and a second electrode unit 412 positioned to face each other, and at this time, The second electrode part 420 may be positioned between the first electrode part 411 and the second electrode part 412. The first electrode unit 411 includes a substrate 411a made of a transparent material and an electrode 411b positioned on the substrate 411a. The electrode 411b is composed of a plurality of pattern electrodes. The second electrode unit 412 includes the substrate 412a and the electrode 412b in the same manner as the first electrode unit 411 and the electrode 412b is formed of a plurality of pattern electrodes. The electrodes 411b and 412b may be formed in a straight shape or a zigzag shape on a plane. The zigzag shape means a shape in which at least one of the electrodes 411b and 412b has a bending portion, and the zigzag shape may include at least one bending portion.

The pattern electrodes 411b and 412b of the first and second electrode units 411 and 412 are configured to apply a horizontal electric field to the liquid crystal 420a of the liquid crystal unit 420. [ 5, when the electrodes of the first and second electrode units 411 and 412 are all formed of the pattern electrodes 411b and 412b, the first and second electrode units 411 and 412 The electric field for changing the phase of the liquid crystal 420a is generated when the horizontal electric field is applied to the liquid crystal 420a. Therefore, compared with the case where the pattern electrodes 411b and 412b are formed on only one side, It can be easily phase-changed from tropics to disordered images. The voltages applied to the adjacent pattern electrodes 411b and 412b may be of different polarities. For example, when a positive voltage is applied to one of the pattern electrodes 411b and 412b, a negative voltage may be applied to the pattern electrodes 411b and 412b adjacent to the corresponding pattern electrode. That is, the odd-numbered pattern electrodes 411b and 412b are supplied with the same voltage between the odd-numbered pattern electrodes 411b and 412b and the even-numbered pattern electrodes 411b and 412b are supplied with the same voltage . Therefore, a voltage difference is generated between the adjacent pattern electrodes 411b and 412b, and a horizontal electric field can be applied to the pattern electrodes 411b and 412b. In addition, the pattern electrodes 411b and 412b facing each other can be configured to apply a voltage of the same polarity. At this time, the difference in voltage applied to the adjacent pattern electrodes 411b and 412b is 5V or more, but the present invention is not limited thereto. The substrates 411a and 412a are the same as the substrates 111a and 112a described above with reference to FIG. The materials of the electrodes 411b and 412b constituting the first and second electrode units 411 and 412 are the same as those of the electrodes 111b and 112b described with reference to FIG.

Alternatively, the pattern electrode may be formed only on one of the first electrode unit 411 and the second electrode unit 412. In this case, the first electrode unit 411 may include a pattern electrode, and the second electrode unit 412 may include an un-patterned electrode. Alternatively, the first electrode portion 411 may include an un-patterned electrode, and the second electrode portion 412 may include a patterned electrode. At this time, since the driving method of the electrode portion including the pattern electrode is the same as the above-mentioned method, the overlapping description will be omitted.

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 400 according to the present embodiment shown in FIG. 5 will be described.

5, since the liquid crystal 420a of the liquid crystal 420 of the light control device 400 is in a homeotropic state regardless of the positive liquid crystal or the DFLC, To operate in a transparent mode.

More specifically, the liquid crystal 420a of the liquid crystal unit 420 is moved by the first polymer 441 of the orientation film 430 and the partition wall 440 and the mesh film 450 during the manufacturing process of the light control device 400, The light coming from the outside in the initial state passes through the liquid crystal part 420 as it is, and the light control device 400 operates in a transparent mode in which the background is seen.

When a voltage is applied to the first and second electrode units 411 and 412 of the light control device 400 and voltage is applied to the liquid crystal unit 420, To a disordered phase with a random tilt angle including the planar phase on the meotropic.

More specifically, when the liquid crystal 420a of the liquid crystal 420 is a positive liquid crystal, since the long axis of the liquid crystal 420a moves with respect to the electric field direction, the voltage is applied to the first electrode portion 411 and the second electrode portion 412 To form a horizontal electric field so that the liquid crystal 120a may change from a homeotropic phase to a disordered phase having a planar phase and a random tilt angle. Specifically, each of the pattern electrodes 411b of the first electrode unit 411 is configured to apply a voltage of a polarity different from that of the neighboring pattern electrodes 411b, and each of the pattern electrodes 411b of the second electrode unit 412 412b are configured to apply a voltage of a polarity different from that of the neighboring pattern electrode 412b. For example, when a positive voltage is applied to one of the pattern electrodes, a negative voltage may be applied to the adjacent pattern electrode. The difference in voltage applied to the adjacent pattern electrodes is 5 V or more, but is not limited thereto.

When the liquid crystal 420a of the liquid crystal unit 420 is a DFLC in which a phase is switched using a frequency, a voltage having a constant frequency (Hz) is applied to the first electrode unit 411 and the second electrode unit 412 For example, by supplying an arbitrary driving voltage having a frequency of 10 KHz to 1 MHz so that the liquid crystal 420a changes from a homeotropic state to a disordered phase having a planar phase and a random tilt angle . However, the scope of the frequency does not limit the present invention.

The liquid crystal 420a of the liquid crystal unit 420 maintains a disordered image having a random tilt angle when light is emitted from the outside to the liquid crystal unit 420, Inside, scattering of light occurs. At this time, as described above, since the mesh film 450 is located inside the liquid crystal part 420, light scattering occurs more randomly in the liquid crystal part 420. [ In this way, when the liquid crystal unit 420 operates in the light-shielding mode, it is possible to display an opaque state of milk color, for example, an opaque white or gray-based color, and as a result, .

The method of returning to the transparent mode again from the shading mode is as follows. If the voltage supplied to the first electrode unit 411 and the second electrode unit 412 of the light control device 400 is cut off when the liquid crystal 420a of the liquid crystal unit 420 is a positive liquid crystal, The liquid crystal 420a of the light control device 400 is phase-shifted to the homeotropic phase on the disordered phase having a random tilt angle, so that the light control device 400 is switched to the transparent mode.

When the liquid crystal 420 is DFLC, when the voltage supplied to the first electrode unit 411 and the second electrode unit 412 of the light control device 400 is cut off or a voltage having a constant frequency is supplied, The liquid crystal 420a of the liquid crystal panel 420 is phase-shifted to the homeotropic phase on a disordered phase having a random tilt angle, so that the light control device 400 is switched to the transparent mode.

6, which is a sectional view of a light control device according to another embodiment of the electrode unit, the first electrode unit 411 and the second electrode unit 412 constituting the electrode unit 410 are connected to a common electrode common electrodes 411c and 412c, and insulating layers 411d and 412d.

6, when the first electrode unit 411 is constituted by the substrate 411a, the plurality of pattern electrodes 411b, the common electrode 411c, and the insulating layer 411d, the substrate 411a, The common electrode 411c is positioned on the common electrode 411c and the pattern electrode 411b is located on the insulating layer 411d. The common electrode 411c may be formed over the entire area of the substrate 411a as shown in Fig. 6, and may be patterned in units of specific areas. Therefore, the common electrode 411c may be arranged so as to overlap with the plurality of pattern electrodes 411b. Insulation layer (411d), but may be made of an inorganic insulating material such as SiNx, SiO _x, silicon nitride (Silicon Nitride) or silicon oxide (Silicon Oxide), but are not necessarily limited thereto. In addition, the insulating layer 411d may be formed of an organic insulating material such as photo acryl or benzocyclobutene (BCB).

When the second electrode portion 412 is composed of the substrate 412a, the plurality of pattern electrodes 412b, the common electrode 412c and the insulating layer 412d, a common electrode 412c is formed under the substrate 412a And an insulating layer 412d is disposed under the common electrode 412c and a pattern electrode 412b is disposed under the insulating layer 412d. The common electrode 412c may be formed over the entire area of the substrate 412a as shown in Fig. 6, or may be patterned on a specific area basis. Therefore, the common electrode 412c may be arranged so as to overlap with the plurality of pattern electrodes 412b. The insulating layer 412d of the second electrode part 412 may be made of the same material as the insulating layer 411d of the first electrode part 411. [

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 400 according to the present embodiment shown in FIG. 6 will be described.

6, since the liquid crystal 420a of the liquid crystal 420 of the light control device 400 is in a homeotropic state regardless of the positive liquid crystal or the DFLC, And operates in a transparent mode for passing the light.

When a voltage is applied to the first and second electrode units 411 and 412 of the light control device 400 and voltage is applied to the liquid crystal unit 420, the liquid crystal 420a of the liquid crystal unit 420 emits light, And changes to a disordered phase with a random tilt angle including the planar phase on the tropics.

More specifically, when the liquid crystal 420a of the liquid crystal 420 is a positive liquid crystal, since the long axis of the liquid crystal 420a moves with respect to the electric field direction, the voltage is applied to the first electrode portion 411 and the second electrode portion 412 To form a horizontal electric field so that the liquid crystal 120a may change from a homeotropic phase to a disordered phase having a planar phase and a random tilt angle. Specifically, each of the pattern electrodes 411b and 411c of the first electrode unit 411 is supplied with voltages of different polarities, and the pattern electrodes 412b of the second electrode unit 412 And the common electrode 412c are configured to be supplied with voltages of different polarities. A horizontal electric field is applied to the pattern electrode 411b and the common electrode 411c of the first electrode unit 411 and the horizontal electric field is applied to the pattern electrode 412b and the common electrode 412c of the second electrode unit 412 An electric field is applied. For example, when a positive voltage is applied to the pattern electrodes 411b and 412b, a negative voltage may be applied to the common electrodes 411c and 412c. Therefore, a voltage difference is generated between the pattern electrode 411b of the first electrode unit 411 and the common electrode 411c to apply a horizontal electric field to the liquid crystal unit 420, and the pattern electrode of the second electrode unit 412 412b and the common electrode 412c to apply a horizontal electric field to the liquid crystal 420. [ In addition, the pattern electrodes 411b and 412b facing each other can be configured to apply a voltage of the same polarity.

When the liquid crystal 420a of the liquid crystal unit 420 is a DFLC in which a phase is switched using a frequency, a voltage having a constant frequency (Hz) is applied to the first electrode unit 411 and the second electrode unit 412 For example, by supplying an arbitrary driving voltage having a frequency of 10 KHz to 1 MHz so that the liquid crystal 420a changes from a homeotropic state to a disordered phase having a planar phase and a random tilt angle . However, the scope of the frequency does not limit the present invention.

The liquid crystal 420a of the liquid crystal part 420 maintains a disordered image having a random tilt angle when light externally enters the liquid crystal part 420, Inside, scattering of light occurs.

The method of returning to the transparent mode again from the shading mode is the same as that described with reference to FIG.

5 and 6, the light control device 400 according to the embodiment of the present invention can maintain the transparent mode in the initial state, and the first electrode unit 411 and the second electrode unit 411 The light shielding mode can be maintained when a voltage is applied to the light source 412. Accordingly, since the light control device 400 can normally maintain the transparent mode and can maintain the light shielding mode as required, the power consumption of the light control device 400 is reduced, It can be used as a window or smart window of a facility.

Although both the first electrode unit 411 and the second electrode unit 412 include a plurality of pattern electrodes in FIG. 5, only one of the first electrode unit 411 and the second electrode unit 412 Of patterned electrodes. Although both the first electrode unit 411 and the second electrode unit 412 include a plurality of pattern electrodes and a common electrode in FIG. 6, the first electrode unit 411 and the second electrode unit 412 May include a plurality of pattern electrodes and a common electrode.

7 is a cross-sectional view of a light control device according to another embodiment of the electrode portion of FIG. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the light control device according to the present embodiment will be described with reference to these.

7, the light control device 500 according to the embodiment of the present invention includes an electrode unit 510, a liquid crystal unit 520, an orientation unit 530, a partition 540, a mesh film 550, And a spacer. More specifically, the orientation unit 530, the partition 540, the mesh film 550, and the spacers, which constitute the light control device 500 of the present embodiment, The portion 430, the partition 440, the mesh film 450, and the spacer. Therefore, the description of the overlapping elements already described with reference to FIG. 5 will be omitted.

7, the electrode unit 510 of the light control device 500 includes a first electrode unit 511 and a second electrode unit 512 positioned to face each other, and at this time, The second electrode unit 520 may be positioned between the first electrode unit 511 and the second electrode unit 512. The first electrode unit 511 includes a substrate 511a made of a transparent material and an electrode 511b positioned on the substrate 511a. The electrode 511b includes a plurality of pattern electrodes. However, the second electrode part 512 includes only the substrate 512a made of a transparent material, and no separate electrode is formed on the substrate. That is, only the first electrode unit 511 of the first electrode unit 511 and the second electrode unit 512 includes a plurality of pattern electrodes 511b, and the second electrode unit 512 does not include electrodes . The pattern electrode 511b of the first electrode unit 511 is configured to apply a horizontal electric field to the liquid crystal 520a of the liquid crystal unit 520. [ At this time, the driving method of the first electrode unit 511 including the pattern electrode 511b is the same as the method described with reference to FIG. 5, and thus a duplicate description will be omitted. The substrates 511a and 512a are the same as the substrates 111a and 112a described above with reference to FIG. The material of the electrode 511b constituting the first electrode unit 511 is the same as the material of the electrode 111b described above with reference to FIG.

Although not shown in FIG. 7, the second electrode unit 512 includes a plurality of pattern electrodes, and the first electrode unit 511 may not include an electrode.

8 is a cross-sectional view of a light control device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the light control device according to the present embodiment will be described with reference to these.

8, the light control device 600 includes an electrode unit 610, a liquid crystal unit 620, an alignment unit 630, a partition 640, a mesh film 650, a spacer and a coloring member 670, . More specifically, the electrode portion 610, the liquid portion 620, the alignment portion 630, the partition 640, the mesh film 650, and the spacers, which constitute the light control device 600 of the present embodiment, The liquid portion 420, the orientation portion 430, the partition 440, the mesh film 450, and the spacer that constitute the light control device 400 described with reference to FIGS. Therefore, the description of the overlapping elements already described with reference to FIGS. 5 and 6 will be omitted.

Referring to FIG. 8, the light control device 600 according to the present embodiment further includes a coloring member 670 located inside the liquid crystal portion 620. The coloring member 670 according to this embodiment is the same as the coloring member 270 described above with reference to Fig. That is, the coloring member 670 may be a dye having a color of any one of black, red, green, blue, and yellow or a mixture thereof dye).

Thus, the light control device 600 according to the present embodiment can shield the backlight while displaying various colors as well as the colors of the black system when implemented in the light shielding mode. In addition, since the light control device 600 according to the embodiment of the present invention can provide various colors when the light shielding mode is implemented, it can provide the aesthetic effect to the user. For example, the light control device 600 can be used in a public place, and when the light control device 600 is applied to a smart window or a public window requiring a transparent mode and a light shielding mode, And can be shielded from light. In addition, the role and effect of the coloring member 670 according to the present embodiment and the driving method are the same as the role and effect of the coloring member 270 described above with reference to FIG. 3 and the driving method.

9 is a cross-sectional view of a light control device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the light control device according to the present embodiment will be described with reference to these.

9, the light control device 700 includes an electrode portion 710, a liquid portion 720, an alignment portion 730, a partition wall 740, a mesh film 750, a spacer, a coloring member 770, And an index matching layer 780. More specifically, the electrode portion 710, the liquid portion 720, the alignment portion 730, the partition 740, the mesh film 750, and the spacer, which constitute the light control device 700 of this embodiment, The liquid portion 420, the alignment portion 430, the partition wall 440, the mesh film 450, and the spacer that constitute the light control device 400 described with reference to FIG. The coloring member 770 constituting the light control device 700 is the same as the coloring member 670 described with reference to Fig.

Referring to FIG. 9, the light control apparatus 700 further includes a refractive index matching layer 780. At this time, the refractive index matching layer 780 has the same role, effect, and function as the refractive index matching layer 380 described above with reference to FIG. Therefore, the description of the overlapping elements already described with reference to FIGS. 4 to 8 will be omitted.

The refractive index matching layer 780 can improve the refractive index difference of each constituent element of the light control device 700 to provide an improved transmittance than when the light control device 700 operates in the transparent mode, It is possible to provide an improved shading ratio compared with the case where the light source 700 operates in the light shielding mode. In addition, since the refractive index matching layer 780 is made of an insulating material, it is possible to prevent the occurrence of disconnection in the light control device 700, so that driving reliability of the light control device 700 can be enhanced.

Hereinafter, a manufacturing process of a light control device according to embodiments of the present invention will be described with reference to FIGS. 10A to 10F, which are schematic flowcharts of a manufacturing process of a light control device according to embodiments of the present invention. 10A to 10F show the manufacturing process of the light control device 100 with reference to the light control device 100 shown in FIG.

A mixed liquid crystal 120m obtained by mixing the first monomer 141m, the second monomer 142m and the liquid crystal 120a is prepared as shown in Fig. 10A. At this time, the liquid crystal 120a is made of any one of negative liquid crystal, positive liquid crystal and DFLC. The first monomer 141m of the different kinds of monomers 141m and 142m is a monomer for forming the first polymer 141 and the second monomer 142m is a monomer for forming the second polymer 142 .

Here, the ratio of the liquid crystal 120a to the monomers 141m and 142m may be 80:20 to 95: 5. If the ratio of the liquid crystal 120a is less than 80 wt% of the mixed liquid crystal 120m, light scattering by the liquid crystal 120a may not be performed well. In addition, when the ratio of the liquid crystal 120a is larger than 95 wt% of the mixed liquid crystal 120m, the light scattering by the liquid crystal 120a is excessively well performed, and the transparent mode may not be realized well. Accordingly, the ratio of the liquid crystal 120a to the monomers 141m and 142m may be 80:20 to 95: 5. Here, the ratio of the first monomer 141m to the second monomer 142m is 1: 1 to 1: 2.5 days, regardless of the ratio of the liquid crystal 120a and the monomers 141m and 142m in the mixed liquid crystal 120m .

In some embodiments, the mixed liquid crystal 120m may further include coloring members 270, 370, 670, and 770 as shown in Figs. 3, 4, 8, and 9. At this time, the coloring members 270, 370, 670, and 770 are relatively small in amount compared to the liquid crystal 120a and the monomers 141m and 142m, and the amounts of the coloring members 270, 370, The ratio of the monomers 141m and 142m is the same as that described above irrespective of the presence or absence of the coloring members 270, 370, 670, and 770.

Next, as shown in FIG. 10B, a first electrode portion 111 and a second electrode portion 112 are prepared. Specifically, the electrode 111b is disposed on one surface of the substrate 111a, and the electrode 112b is disposed on one surface of the substrate 112a to form the first electrode portion 111 and the second electrode portion 112 You can prepare. 10B, the first alignment member 131 may be disposed on the first electrode portion 111 and the second alignment member 132 may be disposed on the second electrode portion 112 .

Subsequently, the spacer is placed on at least one of the first electrode portion 111 and the second electrode portion 112. For example, the spacer may be placed on the first electrode part 111, or the spacer may be placed on the second electrode part 112. [

Then, the first electrode part 111 and the second electrode part 112 are bonded together with a spacer interposed therebetween.

10C, a liquid crystal portion including the mixed liquid crystal 120m is formed on the first electrode portion 111 and the second electrode portion 112 with the cell gap formed by the spacer. More specifically, in a state where the first electrode unit 111 and the second electrode unit 112 are attached to each other, the mixed liquid crystal 120m is injected into the first electrode unit 111 and the second electrode unit 112 using an injection method using capillary phenomenon, (112).

In some embodiments, when the first electrode unit 111 and the second electrode unit 112 are attached to each other using a roll-to-roll process, a squeeze process for injecting the mixed liquid crystal simultaneously with the roll- The first electrode part 111 and the second electrode part 112 can be injected between the first electrode part 111 and the second electrode part 112.

Subsequently, as shown in Figs. 10D and 10E, after the mask M having the pattern PT is positioned, the monomers 141m and 142m are cured by using UV to form barrier ribs (140). For example, the curing process can be performed by irradiating ultraviolet light having a wavelength of 365 nm for 10 to 60 minutes at an intensity of 10 to 100 mW. At this time, a partition wall 140 is formed in a region corresponding to the pattern PT. The partition 140 is formed by curing the respective monomers 141m and 142m to form the polymerized first polymer 141 and the second polymer 142 .

More specifically, the monomers 141m and 142m in the region corresponding to the pattern (PT) of the mask (M) irradiated with UV light are phase-separated from the mixed liquid crystal 120m mixed together and cured. As the curing progresses, the monomer changes to polymer in the cured region. As the curing process progresses, the monomers (141m, 142m) in the region where the UV is not irradiated in the mixed liquid crystal (120m) are moved to the place where the polymer exists. Accordingly, the monomers 141m and 142m, which are dispersed throughout the mixed liquid crystal 120m, collect in the region where the curing proceeds, and ultimately, the barrier 140 including the first and second polymers 141 and 142 .

At this time, the first monomer 141m is a monomer having the same shape as the liquid crystal 120a. Since the first monomer 141m has the same shape as the liquid crystal 120a, it can help the liquid crystal 120a to be homeotropic in the UV curing process. That is, the first monomer 141m has the same shape as the liquid crystal 120a and can improve the vertical alignment of the liquid crystal 120a during the UV curing process.

Next, as shown in FIGS. 10E and 10F, the netting films 141 and 142m are UV-cured to form the mesh film 150 by curing the curing time shorter than that for forming the barrier ribs. For example, the curing process can be performed in such a manner that UV is irradiated at a wavelength of 365 nm for a time of 3 to 100 seconds at an intensity of 10 to 300 mW. The UV irradiation energy is determined by the UV irradiation time and the irradiation intensity. Here, the curing process is carried out at different irradiation times. Alternatively, the curing process may be carried out at a different irradiation intensity. Accordingly, the barrier ribs 140 are hardened by the UV irradiation energy relatively higher than the hardening for forming the mesh film 150 to form the barrier ribs 140, and the mesh film 150 is relatively harder than the hardening for forming the barrier ribs 140 The mesh film 150 can be formed by curing with low UV irradiation energy.

At this time, the mesh film 150 includes the first polymer 141 and the second polymer 142, which are polymerized by curing the respective monomers 141m and 142m, as well as the barrier ribs 140. Specifically, in the curing process for forming the mesh film, the remaining monomers 141m and 142m in the curing process for forming the barrier ribs 140 are cured at arbitrary positions over the entire area to form the mesh film 150. [

11A is a schematic plan view illustrating a display device to which a light control device according to an embodiment of the present invention is applied. 11B is a cross-sectional view of the display device according to XI-XI 'of FIG. 11A. Referring to Figs. 11A and 11B, a display device 1100 includes a display panel 1190 and a light control device 100. Fig. 11A shows only a part of a plurality of pixels P of the display device 1100 for convenience of description and shows only the black matrix 1140 and the barrier ribs 140 of the display device 1100. FIG.

The display panel 1190 is a panel for displaying an image, and may be, for example, an organic light emitting display panel. Specifically, the display panel 1190 may be a transparent organic light emitting display panel or a transparent flexible organic light emitting display panel including a transmissive area TA as shown in FIGS. 11A and 11B. However, the present invention is not limited to this, and the display panel 1190 can display images in various ways.

Referring to FIG. 11B, the display panel 1190 is a top emission type organic light emitting display panel in which light emitted from the organic light emitting device 1130 is emitted toward the upper substrate 1115 side. Further, the display panel 1190 is a transparent organic electroluminescent display panel including a transmissive area TA.

11A and 11B, the display panel 1190 includes a plurality of pixels P, and each pixel P has a transmissive area TA, a light emitting area EA, and a circuit area CA . The transmissive area TA is an area through which external light incident from the outside of the display panel 1190 is transmitted. The user can view the background, that is, the background behind the display device 1100, through the transmissive area TA. The light emitting region EA is a region where light emitted from the organic light emitting element 1130 is emitted, and is an area where an image is displayed by the organic light emitting element 1130. The circuit region CA is an area in which various circuits for driving the organic light emitting element 1130 are arranged, and can overlap with the light emitting region EA.

Referring to FIG. 11B, a thin film transistor 1120 is disposed on a lower substrate 1111 of a display panel 1190. Specifically, the thin film transistor 1120 is disposed in the circuit region CA and includes a gate electrode, an active layer, a source electrode, and a drain electrode. Further, a gate insulating layer 1112 for insulating the gate electrode from the active layer is disposed. A planarization layer 1113 for planarizing the upper portion of the thin film transistor 1120 is disposed on the thin film transistor 1120 and an organic light emitting element 1130 is disposed on the planarization layer 1113. [ The organic light emitting element 1130 is disposed in the light emitting region EA and includes an anode 1131 for supplying holes to the organic light emitting layer 1132, a cathode 1133 for supplying electrons to the organic light emitting layer 1132, ). The anode 1131 is electrically connected to the thin film transistor 1120 through the contact hole of the planarization layer 1113. As described above, since the display panel 1190 is a top emission type organic light emitting display panel, the anode 1131 is formed by, for example, a transparent conductive layer made of at least a transparent conductive oxide (TCO) And reflects light emitted from the organic light emitting diode 1130 to the upper portion of the display panel 1190. However, the anode 1131 may be defined to include only a transparent conductive layer, and the reflective layer may be defined to be a separate component from the anode 1131. [ A bank 1114 defining the light emitting region EA is disposed on the anode 1131 and an organic light emitting layer 1132 and a cathode 1133 are disposed on the anode 1131 and the bank 1114. The organic light emitting layer 1132 can emit light of a specific color, for example, emit light of any one of white, red, green, and blue. Hereinafter, it is assumed that the organic light emitting layer 1132 emits white light. A cathode 1133 is disposed on the organic light emitting layer 1132. As described above, since the display panel 1190 is the top emission organic electroluminescent display panel 1190, the cathode 1133 can be made of a transparent conductive material or a metallic material. When the cathode 1133 is made of a metal material, the cathode 1133 is formed with a very thin thickness, and light emitted from the organic light emitting layer 1132 can pass through the cathode 1133.

A black matrix 1140 is disposed on the upper substrate 1115 of the display panel 1190. The black matrix 1140 is disposed at the boundary of the pixel P and at the boundary between the transmissive area TA and the light emitting area EA. Further, a color filter 1150 is disposed in the light emitting region EA in the upper substrate 1115 of the display panel 1190. The color filter 1150 may be one of a red color filter, a green color filter, and a blue color filter, but may be a color filter capable of passing light of different colors without being limited thereto. The upper substrate 1115 and the lower substrate 1111 are bonded together by an adhesive layer 1160. Although not shown in FIG. 11B, a sealing layer for protecting the organic light emitting element 1130 from moisture and oxygen from the outside may be further included in the display panel 1190.

The light control device 100 can be coupled to the display panel 1190. Accordingly, the light control device 100 can provide a light shielding mode and a transparent mode to the user. More specifically, the light control device 100 can be attached to the rear surface of the display panel 1190, which is the opposite surface of the front surface of the display panel 1190, which is the light emitting surface of the display panel 1190 have. In this case, although not shown in FIG. 11B, the optical control device 100 is attached to the back surface of the transparent display panel 1190 using an adhesive member such as OCA (optical clear adhesive), which is one of the optical transparent adhesives When the lamination process is performed, the light control device 100 and the display panel 1190 can be finally combined. Further, the OCA may have a refractive index value selected within the range of 1.4 to 1.9.

The barrier ribs 140 of the light control device 100 are arranged to correspond to the black matrix 1140 of the display panel 1190. [ 11A and 11B, the barrier ribs 140 of the light control device 100 are arranged so as to overlap the black matrix 1140 of the display panel 1190, And the boundary between the transmissive area TA and the light emitting area EA. The width WA of the barrier ribs 140 may be equal to the width WB of the black matrix 1140 or may be smaller than the width WB of the black matrix 1140. [ When the barrier ribs 140 of the light control device 100 are arranged as described above, the barrier ribs 140 may be arranged in a mesh structure on a plane as shown in FIG. 11A. Further, the barrier ribs 140 may be arranged in a stripe shape so as to overlap only part of the black matrix 1140 (not shown).

The barrier ribs 140 of the light control device 100 as described above can be manufactured in the manner as described in FIG. 10D. That is, in order to form the partition wall 140 at a position corresponding to the black matrix 1140 of the display panel 1190, a mask M having a pattern PT corresponding to the black matrix 1140 of the display panel 1190 The barrier ribs 140 may be formed in such a manner as to irradiate UV light.

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 100 will be described with reference to the display device 1100 providing an image.

The light control device 100 is implemented in a transparent mode while the display panel 1190 does not provide an image. As described above, since the phase of the liquid crystal 120a of the liquid crystal 120 in the initial state of the light control device 100 is a homeotropic state, the light control device 100 controls the light control And is implemented in a transparent mode in which light from the outside passes through the device 100 in a state in which no voltage is applied.

While the display panel 1190 provides an image, the light control device 100 blocks the light incident from the rear surface, which is the opposite surface of the front surface, which is the light emitting surface of the display panel 1190 . The first electrode unit 111 and the second electrode unit 112 are arranged such that a voltage difference is generated between the first electrode unit 111 and the second electrode unit 112 of the light control device 100 while the display panel 1190 provides an image, The liquid crystal 120a of the liquid crystal unit 120 is disorderly arranged. Accordingly, the liquid crystal unit 120 scatters light coming from the outside, and the light control device 100 blocks visible light from the outside through the back surface of the display panel 1190, thereby improving the image quality of the image .

Further, the light control device 100 can provide aesthetic effect to the user in addition to the function of the light shielding plate, if necessary. For example, when the coloring member 270 as shown in FIG. 3 is applied to the light control device 100, a background image having a color may be provided to the user by displaying the color of the coloring member 270 .

11B, the barrier 140 of the light control device 100 is shown as being disposed at both the boundary between the pixels P of the display panel 1190 and the boundary between the transmissive area TA and the light emitting area EA, The barrier ribs 140 may be disposed so as to overlap only the black matrix 1140 disposed at the boundary between the pixels P of the display panel 1190. [

Since the light emitting area EA of the display panel 1190 is a region in which light is emitted and is not an area that allows external light to pass therethrough, the portion of the light control apparatus 100 corresponding to the light emitting region EA It may not be implemented in a light-shielding mode and a transparent mode. That is, the portion of the light control device 100 corresponding to the light emitting region EA may be always in a transparent mode. 11B, the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are arranged to correspond to both the light emitting region EA and the transmissive region TA, The electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 may be disposed only in the transmissive region TA.

Although the optical control device 100 shown in FIGS. 1 and 2 is shown as being used as the optical control device 100 in FIG. 11B, the optical control devices 200 and 300 shown in FIGS. 3 to 9 , 400, 500, 600, 700 may be used in combination with the display panel 1190. 11B, the first electrode unit 111 of the light control device 100 is shown as being in contact with the lower substrate 1111 of the display panel 1190, but the second electrode unit 112 of the light control device 100 May be in contact with the lower substrate 1111 of the display panel 1190.

The lower substrate 1111 of the display panel 1190 may be one of the substrates constituting the first electrode portion 111 or the second electrode portion 112 of the light control device 100. [ The electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 constituting the light control device 100 is connected to the lower substrate 1111 of the display panel 1190, The lower substrate 1111 of the display panel 1190 functions as the substrate 111a or 112a constituting the first electrode unit 111 or the second electrode unit 112. [ The electrode 111b of the lower substrate 1111 and the first electrode unit 111 or the electrode 112b of the second electrode unit 112 may have the same structure as the first electrode unit 111 or the second electrode unit 112, (112).

11C is a cross-sectional view of a display device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the display device according to the present embodiment will be described with reference to these.

11C, the barrier ribs 140 of the light control device 100 are disposed to overlap with the black matrix 1140 of the display panel 1190 and may also be disposed in the light emitting area EA of the display panel 1190 have. At this time, the width WA1 of the barrier ribs 140 overlapping only the black matrix 1140 is equal to the width WB of the black matrix 1140, and the width WB of the barrier ribs 140 overlapping the black matrix 1140 and the light- Is smaller than the width (WA2) Since the light emitting area EA of the display panel 1190 is a region in which light is emitted and is not an area through which external light can pass, The liquid crystal 120a for blocking or passing light may not be disposed. Therefore, the partition 140 of the light control device 100 may be formed so as to correspond to the entire light emitting area EA as shown in FIG. 11C.

The barrier 140 of the light control device 100 may be manufactured in the manner as described in FIG. 10D. That is, the mask (M) having the pattern (PT) at the position corresponding to the black matrix 1140 of the display panel 1190 and the position corresponding to the light emitting area (EA) May be formed.

The driving method of the light control device 100 coupled with the display panel 1190 is the same as that described above with reference to FIG. 11B, and a duplicated description will be omitted.

11C, the barrier rib 140 is formed to correspond to the entire luminescent region EA. However, the barrier rib 140 may be formed to correspond to only a portion of the luminescent region EA.

11D is a cross-sectional view of a display device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the display device according to the present embodiment will be described with reference to these.

Referring to FIG. 11D, the light control device 100 may be attached to a front surface, which is a light emitting surface of the display panel 1190. In this case, although not shown in FIG. 11D, when the optical control device 100 is attached to the back surface of the transparent display panel 1190 by using an adhesive member such as OCA, which is one of the optical transparent adhesives, Finally, the light control device 100 and the display panel 1190 can be combined.

The barrier ribs 140 of the light control device 100 are arranged to correspond to the black matrix 1140 of the display panel 1190. [ 11D, the barrier ribs 140 of the light control device 100 are arranged so as to overlap with the black matrix 1140 of the display panel 1190, Is disposed at both the boundary and the boundary between the transmissive area TA and the light emitting area EA. The width WA of the barrier ribs 140 may be equal to the width WB of the black matrix 1140 or may be smaller than the width WB of the black matrix 1140. [ When the barrier ribs 140 of the light control device 100 are arranged as described above, the barrier ribs 140 may be arranged in a mesh structure on a plane. Further, the barrier ribs 140 may be arranged in a stripe structure so as to overlap with a part of the black matrix 1140 although not shown.

The barrier ribs 140 of the light control device 100 as described above can be manufactured in the manner as described in FIG. 10D. That is, in order to form the partition wall 140 at a position corresponding to the black matrix 1140 of the display panel 1190, a mask M having a pattern PT corresponding to the black matrix 1140 of the display panel 1190 The barrier ribs 140 may be formed in such a manner as to irradiate UV light.

The electrode 111b of the first electrode part 111 and the electrode 112b of the second electrode part 112 are arranged in the transmissive area TA, Respectively. The liquid crystal 120a is disposed in all areas of the light control device 100 in the manufacturing process of the light control device 100. [ 10C to 10F, in a state in which the mixed liquid crystal 120m is disposed in the entire region of the light control device 100, the light control device (not shown) is disposed in such a manner that the partition wall 140 and the mesh film 150 are cured It is difficult to place the liquid crystal 120a in the empty space without arranging the liquid crystal 120a in the portion of the light control device 100 corresponding to the light emitting region EA. Accordingly, when the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are disposed in the light emitting area EA, The light emitted from the light emitting area EA may be blocked by the light control device 100. [ 11D, the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are formed so as to correspond only to the transmissive region TA, TA, and the portion of the light control device 100 corresponding to the light emitting region EA is always kept in the transparent mode.

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 100 will be described with reference to the display device 1100 providing an image.

The light control device 100 is implemented in a transparent mode while the display panel 1190 does not provide an image. That is, in a state where no voltage is applied to the light control device 100, the light control device 100 is implemented in a transparent mode in which light coming from the outside is passed.

While the display panel 1190 provides the image, the light control device 100 is configured to block light incident from the backside. Specifically, while the display panel 1190 provides an image, a voltage is applied to the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 of the light control device 100 So that the liquid crystal 120a of the liquid crystal unit 120 is disorderly arranged. Therefore, the liquid crystal unit 120 scatters light coming from the outside, and the light control device 100 blocks visible light from outside through the transmission area TA of the display panel 1190, Can be improved. At this time, since the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are not formed in the portion of the light control device 100 corresponding to the light emitting region EA, It still operates in the transparent mode, and the user can view the image through the light emitting area EA.

11D, the barrier 140 of the light control device 100 is shown as being disposed at both the boundary between the pixels P of the display panel 1190 and the boundary between the transmissive area TA and the light emitting area EA, The barrier ribs 140 may be arranged so as to overlap only the black matrix 1140 disposed at the boundary of the pixels P of the display panel 1190. [

The upper substrate 1115 of the display panel 1190 may be one of the substrates constituting the first electrode portion 111 or the second electrode portion 112 of the light control device 100. [ For example, the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 constituting the light control device 100 is connected to the upper substrate 1115 of the display panel 1190, The upper substrate 1115 of the display panel 1190 functions as the substrate 111a or 112a constituting the first electrode unit 111 or the second electrode unit 112. [ Accordingly, when the upper substrate 1115 and the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 are formed of the first electrode unit 111 or the second electrode unit 112 described above, (112).

The barrier 140 may also be formed in the light emitting area EA when the light control device 100 is attached to the front surface of the display panel 1190. [ 11C, a part of the barrier ribs 140 may overlap only the black matrix 1140 and the other part may overlap the black matrix 1140 and the luminescent region EA. The barrier ribs 140 are formed to correspond to the entire luminous region EA to correspond to the luminous region EA because the barrier ribs 140 are made of a transparent photocurable monomer capable of passing light therethrough, The portion of the light control device 100 that transmits light can always transmit light.

11A to 11D, the display panel 1100 is a top emission type organic electroluminescence display panel or a bottom emission type organic electroluminescence display panel. However, the display panel 1100 may be a two- Emitting display panel. That is, the display panel 1100 can display an image through a front surface and a rear surface of the display panel. In this case, the light control device 100 may be disposed on only one of the front surface and the rear surface of the display panel 1100, and may be disposed on both the front and back surfaces of the display panel 1100 It is possible. That is, at least one light control device 100 may be attached to the display panel 1100.

12A is a schematic plan view illustrating a display device to which a light control device according to an embodiment of the present invention is applied. 12B is a cross-sectional view of the display device according to XII-XII 'of Fig. 12A. 12A and 12B, the display device 1200 includes a display panel 1290 and a light control device 100. 12A shows only a part of a plurality of pixels P of the display device 1200 for convenience of description and shows only the black matrix 1240 and the barrier ribs 140 of the display device 1200. FIG. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the display device 1200 according to the present embodiment will be described with reference to these.

12B, the display panel 1290 is a bottom emission organic light emitting display panel in which light emitted from the organic light emitting diode 1230 is emitted to the lower substrate 1211 side. Further, the display panel 1290 is a transparent organic electroluminescence display panel including a transmissive region TA.

12A and 12B, the display panel 1290 includes a plurality of pixels P, and each pixel P has a transmissive area TA, a light emitting area EA, and a circuit area CA . Compared with the display device 1100 described with reference to Figs. 11A and 11B, since the display panel 1290 shown in Figs. 12A and 12B is the bottom emission type organic light emitting display panel, The circuit areas CA do not overlap each other. That is, since the light emitted from the light emitting region EA passes through the lower substrate 1211 and is emitted to the outside, the circuit region CA in which various circuits are arranged does not overlap with the light emitting region EA.

Referring to FIG. 12B, a thin film transistor 1220 is disposed on a lower substrate 1211 of a display panel 1290. Specifically, the thin film transistor 1220 is disposed in the circuit area CA. Further, a gate insulating layer 1212 for insulating the gate electrode from the active layer is disposed. A planarization layer 1213 for planarizing an upper portion of the thin film transistor 1220 is disposed on the thin film transistor 1220 and an organic light emitting element 1230 is disposed on the planarization layer 1213. [ The organic light emitting element 1230 is disposed in the light emitting region EA and includes an anode 1231 for supplying holes to the organic light emitting layer 1232, a cathode 1232 for supplying electrons to the organic light emitting layer 1232, ). The anode 1231 is electrically connected to the thin film transistor 1220 through the contact hole of the planarization layer 1213. As described above, since the display panel 1290 is a bottom emission type organic light emitting display panel, the anode 1231 includes a transparent conductive layer made of a transparent conductive oxide (TCO). A bank 1214 defining the light emitting region EA is disposed on the anode 1231 and an organic light emitting layer 1232 and a cathode 1233 are disposed on the anode 1231 and the bank 1214. [ The organic light emitting layer 1232 can emit light of a specific color, for example, and emit light of any one of white, red, green, and blue. Hereinafter, it is assumed that the organic light emitting layer 1232 emits white light. A cathode 1233 is disposed on the organic light emitting layer 1232. As described above, since the display panel 1290 is a bottom emission type organic light emitting display panel, the cathode 1233 can be made of a metal material. The upper substrate 1215 and the lower substrate 1211 are bonded together by an adhesive layer 1260. Although not shown in FIG. 12B, a sealing layer for protecting the organic light emitting element 1230 from moisture and oxygen from the outside may be further included in the display panel 1290.

A black matrix 1240 is disposed on the lower substrate 1211 of the display panel 1290. The black matrix 1240 is disposed in the boundary between the pixels P, the boundary between the light emitting region EA and the circuit region CA, the boundary between the transmissive region TA and the circuit region CA, and the circuit region CA . A color filter 1250 is disposed in the light emitting area EA in the lower substrate 1211 of the display panel 1290. [ The color filter 1250 may be one of a red color filter, a green color filter, and a blue color filter, but may be a color filter capable of passing light of different colors without being limited thereto. An overcoat layer 1216 for planarizing the color filter 1250 is disposed on the color filter 1250 and a thin film transistor 1220 is disposed on the overcoat layer 1216. [

The light control device 100 can function as a light shielding plate by being combined with the display panel 1290. [ 12B, the light control apparatus 100 may be attached to the front surface of the display panel 1290, which is the opposite surface of the rear surface of the display panel 1290, which is the light exiting surface of the display panel 1290. [ 12B, when the optical control device 100 is attached to the back surface of the transparent display panel 1290 using a bonding material such as OCA, which is one of the optical transparent adhesives, and then subjected to a lamination process Finally, the light control device 100 and the display panel 1290 can be combined.

The barrier ribs 140 of the light control device 100 are arranged to correspond to the black matrix 1240 of the display panel 1290. [ 12B, the barrier 140 of the light control device 100 has a boundary between the pixels P, a boundary between the light emitting area EA and the circuit area CA, a transmissive area TA, Are arranged in the boundary between the regions CA and in the circuit region CA. The width WA1 of the partition wall 140 disposed at the boundary of the pixel P is equal to the width WB1 of the black matrix 1240 disposed at the boundary of the pixel P or equal to the width WB1 of the black matrix 1240 The width WA2 of the barrier ribs 140 disposed in the circuit region CA may be equal to the width WB2 of the black matrix 1240 disposed in the circuit region CA, May be less than the width WB2 of the first portion 1240. When the barrier ribs 140 of the light control device 100 are arranged as described above, the barrier ribs 140 may be arranged in a mesh structure on a plane as shown in FIG. 12A. In addition, the barrier ribs 140 may be arranged in a stripe structure so as to overlap only a part of the black matrix 1240, though not shown.

The barrier ribs 140 of the light control device 100 as described above can be manufactured in the manner as described in FIG. 10D. That is, in order to form the partition wall 140 at a position corresponding to the black matrix 1240 of the display panel 1290, a mask M (having a pattern PT corresponding to the black matrix 1240 of the display panel 1290) The barrier ribs 140 may be formed in such a manner as to irradiate UV light.

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 100 with respect to the display device 1200 providing images will be described.

The light control device 100 is implemented in a transparent mode while the display panel 1290 does not provide an image. As described above, since the liquid crystal 120a of the liquid crystal 120 in the initial state of the light control device 100 is in a homeotropic state, a voltage is applied to the light control device 100 Transparent mode in which light coming from the outside is passed through in a state where it is not in the state of being exposed.

While the display panel 1290 provides an image, the light control device 100 blocks the light incident from the front surface, which is the opposite surface of the rear surface, which is the light exiting surface of the display panel 1290 . The first electrode unit 111 and the second electrode unit 112 may be arranged such that a voltage difference is generated between the first electrode unit 111 and the second electrode unit 112 of the light control device 100 while the display panel 1290 provides an image, The liquid crystal 120a of the liquid crystal unit 120 is disorderly arranged. Accordingly, the liquid crystal unit 120 scatters light coming from the outside, and the light control device 100 blocks the light from the outside from being visible through the rear surface of the display panel 1290, The image quality can be improved.

Further, the light control device 100 can provide aesthetic effect to the user in addition to the function of the light shielding plate, if necessary. For example, when the coloring member 270 as shown in FIG. 3 is applied to the light control device 100, a background image having a color may be provided to the user by displaying the color of the coloring member 270 .

12B shows a case where the barrier 140 of the light control device 100 has a boundary between the pixels P, a boundary between the light emitting area EA and the circuit area CA, a boundary between the transmitting area TA and the circuit area CA The barrier ribs 140 may be disposed so as to overlap only the black matrix 1240 disposed at the boundary of the pixels P of the display panel 1290. In this case,

Further, the barrier ribs 140 of the light control device 100 may also be disposed in the light emitting area EA. The barrier ribs 140 are formed through the transparent photocurable monomer capable of transmitting light so that the barrier ribs 140 are formed so as to correspond to the entire luminescent region EA, 100 can always transmit light. In this case, the barrier ribs 140 may not be disposed in the circuit area CA.

12B, the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are arranged to correspond to both the light emitting region EA and the transmissive region TA, The electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 may be disposed only in the transmissive region TA. That is, since the light emitting area EA of the display panel 1290 is a region in which light is emitted and is not an area through which external light can pass, a portion of the light control device 100 corresponding to the light emitting area EA It may not be implemented in a light-shielding mode and a transparent mode. That is, the portion of the light control device 100 corresponding to the light emitting region EA may be always in a transparent mode. The electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 may be disposed only in the transmissive region TA.

Although the optical control apparatus 100 shown in FIGS. 1 and 2 is shown as being used as the optical control apparatus 100 in FIG. 12B, the optical control apparatuses 200 and 300 shown in FIGS. 3 to 9 , 400, 500, 600, 700 may be used in combination with the display panel 1290. 11B, the first electrode part 111 of the light control device 100 is shown as being in contact with the lower substrate 1211 of the display panel 1290, but the second electrode part 112 of the light control device 100 May be in contact with the lower substrate 1211 of the display panel 1290.

The upper substrate 1215 of the display panel 1290 may be one of the substrates constituting the first electrode portion 111 or the second electrode portion 112 of the light control device 100. [ For example, the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 constituting the light control device 100 is connected to the upper substrate 1215 of the display panel 1290, The upper substrate 1215 of the display panel 1290 functions as the substrate 111a or 112a constituting the first electrode unit 111 or the second electrode unit 112. [ The upper substrate 1215 and the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 are connected to the first electrode unit 111 or the second electrode unit 112, (112).

12A and 12B, the respective regions are arranged in the order of the transmissive area TA, the circuit area CA, and the light emitting area EA in one pixel P, The arrangement order of the transmissive area TA, the circuit area CA, and the light emitting area EA is not limited to this.

12C is a cross-sectional view of a display device according to another embodiment of the present invention. In describing the present embodiment, description of the same or corresponding elements to those of the previous embodiment will be omitted. Hereinafter, the display device according to the present embodiment will be described with reference to these.

Referring to FIG. 12C, the light control device 100 may be attached to a rear surface of a display panel 1290 through which the display panel 1290 exits the image. 12C, the optical control device 100 is attached to the rear surface of the transparent display panel 1290 using an adhesive such as OCA, which is one of the optical transparent adhesives, The light control device 100 and the display panel 1290 can be finally combined.

The barrier ribs 140 of the light control device 100 are arranged to correspond to the black matrix 1240 of the display panel 1290. [ 12C, the barrier ribs 140 of the light control device 100 are arranged so as to overlap with the black matrix 1240 of the display panel 1290, The boundary between the light emitting region EA and the circuit region CA, the boundary between the transmitting region TA and the circuit region CA, and the circuit region CA.

The barrier ribs 140 of the light control device 100 as described above can be manufactured in the manner as described in FIG. 10D. That is, in order to form the partition wall 140 at a position corresponding to the black matrix 1240 of the display panel 1290, a mask M (having a pattern PT corresponding to the black matrix 1240 of the display panel 1290) The barrier ribs 140 may be formed in such a manner as to irradiate UV light.

The electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are arranged on the rear surface of the display panel 1290, Are formed so as to correspond only to the area TA. The liquid crystal 120a is disposed in all areas of the light control device 100 in the manufacturing process of the light control device 100. [ 10C to 10F, in a state in which the mixed liquid crystal 120m is disposed in the entire region of the light control device 100, the light control device (not shown) is disposed in such a manner that the partition wall 140 and the mesh film 150 are cured It is difficult to place the liquid crystal 120a in the empty space without arranging the liquid crystal 120a in the portion of the light control device 100 corresponding to the light emitting region EA. Therefore, when the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are disposed in the light emitting area EA, the light control device 100 The light emitted from the light emitting region EA may be blocked by the light control device 100. [ 11D, the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are formed so as to correspond only to the transmissive region TA, TA, and the portion of the light control device 100 corresponding to the light emitting region EA is always kept in the transparent mode.

Hereinafter, a driving method of the transparent mode and the light shielding mode of the light control device 100 with respect to the display device 1200 providing images will be described.

The light control device 100 is implemented in a transparent mode while the display panel 1290 does not provide an image. That is, in a state where no voltage is applied to the light control device 100, the light control device 100 is implemented in a transparent mode in which light coming from the outside is passed.

While the display panel 1290 provides an image, the light control device 100 is configured to block light incident from a rear surface. Specifically, while the display panel 1290 provides an image, a voltage is applied to the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 of the light control device 100 The liquid crystal 120a of the liquid crystal part 120 is randomly arranged and the liquid crystal part 120 scatters light coming from the outside so that the light from the outside of the light control device 100 is reflected by the display panel 1290 It is possible to prevent visual recognition through the transmissive area TA, thereby improving the image quality of the image. At this time, since the electrode 111b of the first electrode unit 111 and the electrode 112b of the second electrode unit 112 are not formed in the portion of the light control device 100 corresponding to the light emitting region EA, It still operates in the transparent mode, and the user can view the image through the light emitting area EA.

12C, the barrier 140 of the light control device 100 is located at the boundary between the pixels P, between the light emitting region EA and the circuit region CA, between the transmissive region TA and the circuit region CA The barrier ribs 140 may be disposed so as to overlap only the black matrix 1240 disposed at the boundary of the pixels P of the display panel 1290. In this case,

Further, the barrier ribs 140 of the light control device 100 may also be disposed in the light emitting area EA. The barrier ribs 140 are formed through the transparent photocurable monomer capable of transmitting light so that the barrier ribs 140 are formed so as to correspond to the entire luminescent region EA, 100 can always transmit light. In this case, the barrier ribs 140 may not be disposed in the circuit area CA.

The lower substrate 1211 of the display panel 1290 may be one of the substrates constituting the first electrode portion 111 or the second electrode portion 112 of the light control device 100. [ For example, the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 constituting the light control device 100 is connected to the lower substrate 1211 of the display panel 1290, The lower substrate 1211 of the display panel 1290 functions as the substrate 111a or 112a constituting the first electrode unit 111 or the second electrode unit 112. [ Therefore, when the structure of the lower substrate 1211 and the electrode 111b of the first electrode unit 111 or the electrode 112b of the second electrode unit 112 is the same as that of the first electrode unit 111 or the second electrode unit 112 described above, (112).

While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be apparent that modifications and improvements can be made by those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: light control device 111: first electrode unit
112: second electrode unit 120:
130: orientation member 140:
150: Mesh
1100, and 1200: display devices 1111 and 1211:
1112, 1212: gate insulating layers 1113, 1213: planarization layer
1114, 1214: banks 1115, 1015: upper substrate
1120 and 1220: thin film transistors 1130 and 1230: organic light emitting element
1131, 1231: Anode 1132, 1232: Organic light emitting layer
1133, 1233: cathodes 1140, 1240: black matrix
1150, 1250: Color filters 1160, 1260: Adhesive layer
1190, 1290: display panel 1116: overcoat layer

Claims (35)

A first electrode unit and a second electrode unit facing each other; And
And a liquid crystal portion between the first electrode portion and the second electrode portion,
The liquid-
Liquid crystal;
A mesh comprising a first polymer polymerized from a first monomer having a shape similar to that of the liquid crystal and a second polymer polymerized from a second monomer having a shape different from that of the first monomer; And
And a partition located within the liquid portion and including the first polymer and the second polymer. The method according to claim 1,
And a spacer disposed on at least one of the first electrode portion and the second electrode portion. The method according to claim 1,
Wherein the first monomer and the second monomer are UV curable monomers. The method of claim 3,
Wherein the UV wavelength used for curing the first monomer and the UV wavelength used for curing the second monomer have the same wavelength range. The method according to claim 1,
Wherein the first monomer is a RM (Reactive Mesogen) -based monomer. The method according to claim 1,
Wherein the second monomer is a bisphenol A dimethacrylate-based monomer. The method according to claim 1,
The first monomer assists the vertical alignment of the liquid crystal,
And the second monomer helps to arrange the liquid crystals in disorder. The method according to claim 1,
When the liquid crystal is one of negative liquid crystal or DFLC (dual frequency liquid crystal)
Wherein each of the first electrode portion and the second electrode portion includes a common electrode. 9. The method of claim 8,
When the liquid crystal is a negative liquid crystal,
Wherein each of the first electrode portion and the second electrode portion is configured to apply a vertical electric field to the liquid crystal portion. 10. The method of claim 9,
When no voltage is applied, the light control device exhibits a transparent mode by the liquid crystal having a homeotropic state,
Wherein when the voltage is applied, the light control device exhibits a shading mode by the liquid crystal having a random state. The method according to claim 1,
When the liquid crystal is one of a positive liquid crystal or a DFLC,
Wherein at least one of the first electrode portion and the second electrode portion includes a plurality of pattern electrodes. 12. The method of claim 11,
And a horizontal electric field is applied to the pattern electrode. 13. The method of claim 12,
When no voltage is applied, the light control device exhibits a transparent mode by the liquid crystal having a homeotropic state,
Wherein when the voltage is applied, the light control device exhibits a shading mode by the liquid crystal having a random state. The method according to claim 1,
When the liquid crystal is one of a positive liquid crystal or a DFLC,
Wherein at least one of the first electrode portion and the second electrode portion includes a plurality of pattern electrodes and a common electrode. 15. The method of claim 14,
And a horizontal electric field is applied to the pattern electrode and the common electrode. 16. The method of claim 15,
When no voltage is applied, the light control device exhibits a transparent mode by the liquid crystal having a homeotropic state,
Wherein when the voltage is applied, the light control device exhibits a shading mode by the liquid crystal having a random state. The method according to claim 1,
And an alignment unit for aligning the liquid crystal in a homeotropic state. 18. The method of claim 17,
And the alignment unit is disposed above or below the liquid crystal unit. Attaching the first electrode portion and the second electrode portion;
Forming a liquid crystal portion including a mixed liquid crystal including a first monomer, a second monomer and a liquid crystal between the first electrode portion and the second electrode portion;
Patterning a mask having a pattern on the first electrode portion or the second electrode portion; polymerizing the first monomer and the second monomer to form a partition wall in a region corresponding to the pattern; And
And polymerizing the first monomer and the second monomer at a lower irradiation energy than the step of forming the barrier to form a mesh film. 20. The method of claim 19,
And disposing a spacer in at least one of the first electrode portion and the second electrode portion. 20. The method of claim 19,
Wherein the first monomer and the second monomer are polymerized by light of the same wavelength band. 20. The method of claim 19,
Wherein each of the step of forming the partition wall and the step of forming the mesh film polymerizes the first monomer and the second monomer by UV irradiation. 20. The method of claim 19,
Wherein the first monomer is an RM (Reactive Mesogen) -based monomer. 20. The method of claim 19,
Wherein the second monomer is a bisphenol A dimethacrylate-based monomer. In a mixed liquid crystal comprising a liquid crystal, a first monomer and a second monomer,
The first monomer has a shape similar to the liquid crystal,
Wherein the second monomer has a shape different from that of the first monomer,
Wherein the first monomer and the second monomer are configured to have a netting and a partition in the light control device. 26. The method of claim 25,
When no voltage is applied, the light control device exhibits a transparent mode by the liquid crystal having a homeotropic state,
Wherein when the voltage is applied, the light control device exhibits a light shielding mode by the liquid crystal having a random state. 26. The method of claim 25,
Wherein the first monomer and the second monomer are cured by UV irradiation at the same wavelength band. 26. The method of claim 25,
Wherein the first monomer is a RM (Reactive Mesogen) -based monomer. 26. The method of claim 25,
Wherein the second monomer is a bisphenol A dimethacrylate-based monomer. 26. The method of claim 25,
Wherein the first monomer and the second monomer are polymerized by UV irradiation. 26. The method of claim 25,
Wherein the liquid crystal is one of a positive liquid crystal, a negative liquid crystal or a DFLC (dual frequency liquid crystal). Display panel; And
Characterized in that it comprises at least one light control device attached to the display panel and according to claim 1. 33. The method of claim 32,
Wherein the display panel is an organic light emitting display panel. 33. The method of claim 32,
Wherein the light control device is attached to a front surface of the display panel. 33. The method of claim 32,
Wherein the light control device is attached to a rear surface of the display panel.

Images